Method and device for testing performance of film spreading oil agent capable of simulating controllable drainage in paddy field environment

Abstract

The invention relates to a film spreading oil agent performance testing method and device for simulating controllable drainage of a paddy field environment. The device comprises a water tank, a left space, a transition space and a right space in the water tank are distributed in a U shape, and rice planting points are arranged in the left space, the transition space and the right space respectively; and each rice planting point is provided with a rice planting fixing device. The method comprises the steps that rice seedlings are placed in a rice planting fixing device and placed on rice planting points in a water tank; the water storage tank injects water into the water tank, and the water overflows the rice planting fixing device; adding a preset dosage of to-be-detected film spreading oil agent to the film spreading oil agent adding position of the water tank, then observing the dispersion state, and determining the expansion speed and the expansion area of the to-be-detected film spreading oil agent and the pole climbing height of the to-be-detected film spreading oil agent on each rice seedling stem; and repeating the steps to determine different spreading oil agents to be detected, and comparing and judging the performance of each spreading oil agent to be detected according to the determination results. According to the invention, the performance of the spreading oil agent can be evaluated more effectively, and the spreading oil agent is consistent with the field effect.

Description

Technical Field

[0001] The present invention relates to a device and method for detecting the performance of a labor-saving pesticide preparation, in particular to a method and device for testing the performance of a film-spreading oil preparation simulating controlled drainage in a paddy field environment, and belongs to the field of pesticide preparation research and development in pesticide application technology. Background Art

[0002] The occurrence of pests and diseases in my country's crops is serious, with an average of 6 billion mu of pests and diseases occurring annually and more than 8 billion mu of pests and diseases being controlled. The wide variety of pests and diseases and their high frequency of occurrence have led to a decline in crop yield and quality. To date, chemical control is still the main means of pest and disease control. With the adjustment of my country's planting structure and the intensification of the aging process of the population, the proportion of large-scale planting has increased year by year, and the demand for crop pest and disease control technology has changed significantly. The corresponding demand for labor-saving pesticide application technology has gradually increased. Labor-saving pesticide application technology is reflected in pesticide application equipment on the one hand, and pesticide application preparations and their use methods on the other hand. At present, among the paddy field pesticide application equipment, plant protection drones have the highest pesticide application efficiency, but the pesticide damage caused by droplet drift during drone application frequently occurs, among which the frequency of pesticide damage caused by the application of herbicides is relatively high. In order to reduce the frequency of crop pesticide damage, it is urgent to develop labor-saving preparations for paddy field pest and disease control, such as film-spreading oils. Film-spreading oil agents are mostly applied by sprinkling, forming a thin film on the water surface that can quickly spread throughout the field, thereby coming into contact with the target pests and taking effect.

[0003] The performance of the film-spreading oil determines its efficacy to a large extent, and what affects its performance more is the surfactant system in its dosage form. Since this type of dosage form started relatively late, there are relatively few related supporting R&D technologies and performance measurement methods. At present, the commonly used method is to place the film-spreading oil in the center of a basin, bucket or plastic basin filled with water or in a "U"-shaped water tank to observe the performance indicators of the corresponding dosage form. For example, the invention patent application with application number 201810273396.5 and application publication number CN108522504A mentioned the observation and detection test method of the expansion performance of the film-forming mixture on the water surface, which is to drop the film-forming mixture into the water surface for detection; the invention patent with patent number 201711084087.5 and authorization announcement number CN107864956B mentioned the measurement method, which used a "U"-shaped water tank with a width of 10 cm and a total length of 6 m for detection.

[0004] However, in actual work, the inventor team found that when measuring the performance of the film-spreading oil agent according to the above-mentioned conventional method, it is often found that the indoor performance measurement results of the film-spreading oil agent are good but its field effect is average. The inventor team conducted special research on this and obtained research results. The invention patent is now applied for based on this result. Summary of the invention

[0005] The main purpose of the present invention is to overcome the problems existing in the prior art, propose a method for testing and evaluating the performance of a film-spreading oil agent with controllable drainage simulating a paddy field environment, which can more effectively evaluate the performance of the film-spreading oil agent and maintain consistency with the field effect, and can judge the quality of the expansion performance of the surfactant system in the film-spreading oil agent, so as to facilitate the screening and design of a suitable film-spreading oil agent formula, and ultimately facilitate the efficient application and labor saving of pesticides. At the same time, a device for testing the performance of a film-spreading oil agent with controllable drainage simulating a paddy field environment used in the above method is proposed.

[0006] The technical solution of the present invention to solve the technical problem is as follows:

[0007] The invention discloses a method for testing and evaluating the performance of a film-spreading oil agent with controllable drainage simulating a paddy field environment, wherein a film-spreading oil agent performance testing device with controllable drainage simulating a paddy field environment is used, wherein the device comprises a water tank in the shape of a rectangular parallelepiped and with an open top surface, wherein a partition is arranged in the water tank to divide the internal space of the water tank into a left space, a right space and a transition space connecting the left space and the right space, wherein the left space, the transition space and the right space are arranged in a "U" shape; a film-spreading oil agent delivery point is arranged at the end of the left space or the right space away from the transition space; Rice planting points are respectively arranged in the upper space, transition space and right space; each rice planting point is respectively provided with a rice planting fixing device; a support rod is arranged beside the water tank, a camera is arranged on the support rod, the camera faces the water tank, and a signal output interface of the camera is connected to an external computer via a cable; a water inlet hole and a drain hole are arranged on the side wall of the water tank, a water storage tank is arranged outside the water tank, a water outlet of the water storage tank is provided with a valve, the water outlet of the water storage tank is connected with the water inlet hole of the water tank via a water inlet pipe, the drain hole of the water tank is connected with the drain pipe, and the drain pipe has a valve.

[0008] The method comprises the following steps:

[0009] The first step is to place rice seedlings with a plant height of 10 to 15 cm in each rice planting fixture, and then place each rice planting fixture on a corresponding rice planting point in the water tank.

[0010] Step 2: Fill the water tank with preset test water.

[0011] The third step is to open the valve at the water outlet of the water tank and pour water into the water tank through the water inlet pipe until the water overflows the rice planting fixture and the water depth reaches the preset depth; turn on the camera and computer to take photos or videos of the water tank as needed.

[0012] The fourth step is to add a preset dose of the film-spreading oil agent to be tested to the film-spreading oil agent placement point of the water tank, then observe the dispersion state, and measure the expansion speed, expansion area, and climbing height of the film-spreading oil agent to be tested on the stems of each rice seedling; during this process, take photos or videos as needed for measurement and analysis; after the measurement, open the valve of the drain pipe to drain the water in the water tank.

[0013] Step 5. Repeat steps 1 to 4 to measure different film spreading oils to be tested, and judge the performance of each film spreading oil to be tested based on the test results. The specific process is: first, take the film spreading oil with a climbing pole height ≥ 2 cm as a qualified product, and then compare the expansion speed, expansion area and climbing pole height of each qualified product, and take the film spreading oil with the fastest expansion speed, the largest expansion area and the highest climbing pole height as the final test result.

[0014] This method fully considers the steric hindrance factor of rice and is more in line with the actual field conditions; it can not only measure the expansion speed and expansion area of ​​the film-spreading oil, but also effectively measure and characterize the climbing performance of the film-spreading oil; the controllable water injection method of the water tank can effectively keep the water surface stable, which is more conducive to obtaining accurate measurement results. It has been verified in practice that this method can more effectively evaluate the performance of the film-spreading oil, and maintain consistency with the field effect, and can judge the expansion performance of the surfactant system in the film-spreading oil, which is convenient for screening and designing suitable film-spreading oil formulations, and ultimately conducive to the efficient application and labor saving of pesticides.

[0015] Preferably, in the third step, the preset depth is 4±0.5 cm; and in the fourth step, the preset dose is 20-40 μl.

[0016] Preferably, in the fourth step, the dispersion state is classified according to the following criteria:

[0017] Grade A: fully dispersed on the water surface without precipitation;

[0018] Grade B: dispersed on the water surface, with lower dispersibility than Grade A;

[0019] Grade C: dispersed on the water surface, with lower dispersibility than Grade B, and tends to sink;

[0020] Grade D: dispersed on the water surface, with lower dispersibility than Grade C;

[0021] Grade E: dispersed on the water surface, with lower dispersibility than Grade D;

[0022] Class F: Floating on the water surface without dispersion, carrying the water surface in the form of oil droplets or emulsions;

[0023] The specific method for determining the expansion speed and expansion area is: determine the expansion distance and time of the film-spreading oil to be tested on the water surface, and calculate according to the following formula:

[0024] Expansion speed = expansion distance / expansion time; the unit of expansion speed is cm / s; the expansion distance refers to the distance from the dosing position to the front end position of the film-spreading oil to be tested;

[0025] Extended area = area of ​​rectangle + area of ​​irregular shape; the unit of extended area is cm 2; Divide the diffusion surface of the film-spreading oil to be tested into rectangles and irregular shapes. For rectangles, calculate the area according to their length and width. For irregular shapes, first take a picture, copy its outline on the picture, and then use graphics processing software to calculate its area;

[0026] The specific method for determining the climbing pole height is: measuring the distance between the highest point of the climbing pole of the film-spreading oil agent to be tested on the stem of the rice seedling and the water surface, and the climbing pole height is obtained.

[0027] Preferably, in the first step, rice seedlings cultivated with nutrient soil are used to fix the rice seedlings in a rice implantation fixture using the nutrient soil; in the second step, the test water is preset to be tap water, or tap water containing 1±0.5% by weight of soil; in the fifth step, the film spreading oil agent with a climbing pole height of 2 to 10 cm is regarded as a qualified product.

[0028] By adopting the above preferred scheme, the specific technical details of each step can be further optimized.

[0029] Preferably, the height of the rice implanting and fixing device is smaller than the height of the water tank; the rice implanting and fixing device is coaxially integrally formed by a first tube and a second tube, the inner diameter of the first tube is larger than the inner diameter of the second tube, the outer diameter of the first tube is smaller than the outer diameter of the second tube, and the side wall of the second tube is provided with at least one through hole, which is located at a position of the second tube away from the first tube.

[0030] Preferably, the width of the left space and the right space of the water trough are the same; the rice planting points in the water trough are distributed into at least four rows, each row has at least two rice planting points, the extension direction of each row coincides with the width direction of the water trough, and the spacing between two adjacent rows is the same and is a first preset value; wherein, the rice planting points from the first row to the second to last row are symmetrically distributed in the left space and the right space on both sides of the partition; the first row is far away from the transition space, and the second to last row is close to the transition space; the spacing between the first row and the nearest wide side of the water trough is a second preset value; in the first row to the second to last row, the spacing between the rice planting points in each row close to the partition in the left space and the rice planting points in the right space is a third preset value; the last row is located in the transition space and its rice planting points are symmetrically distributed on both sides of the partition.

[0031] More preferably, the length of the water tank is 100±5cm, the width is 20±2cm, the height is 5±1cm, and the lengths of the left space and the right space are 85±5cm respectively; the first preset value is 20±2cm, the second preset value is 30±2cm, and the third preset value is 4±1cm; the length of the first pipe is 1.7±0.3cm, and the outer diameter is 1.7±0.3cm; the length of the second pipe is 1±0.2cm, and the outer diameter is 2±0.2cm; the aperture of the through hole is 0.3±0.1cm.

[0032] By adopting the above preferred scheme, the structural characteristics of the adopted device can be further optimized.

[0033] The present invention also provides:

[0034] The invention discloses a film spreading oil agent performance testing device with controllable drainage simulating a paddy field environment, comprising a water tank in the shape of a rectangular parallelepiped with an open top surface, and is characterized in that a partition is provided in the water tank to divide the internal space of the water tank into a left space, a right space and a transition space connecting the left space and the right space, and the left space, the transition space and the right space are distributed in a "U" shape; a film spreading oil agent delivery point is provided at the end of the left space or the right space away from the transition space; rice planting points are respectively provided in the left space, the transition space and the right space; each rice planting point is respectively provided with a rice planting fixing device; a support rod is provided beside the water tank, a camera is provided on the support rod, the camera faces the water tank, and a signal output interface of the camera is connected to an external computer via a cable; a water inlet hole and a drain hole are provided on the side wall of the water tank, a water storage tank is provided outside the water tank, a water outlet of the water storage tank is provided with a valve, the water outlet of the water storage tank is connected with the water inlet hole of the water tank via an inlet pipe, and the drain hole of the water tank is connected with a drain pipe, and the drain pipe has a valve.

[0035] The use of this device can more effectively evaluate the performance of film-spreading oil agents and maintain consistency with the field effects. It can judge the extension performance of the surfactant system in the film-spreading oil agent, facilitate the screening and design of suitable film-spreading oil agent formulas, and ultimately facilitate the efficient application and labor-saving of pesticides.

[0036] Preferably, the width of the left space and the right space of the water trough are the same; the rice planting points in the water trough are distributed into at least four rows, each row has at least two rice planting points, the extension direction of each row coincides with the width direction of the water trough, and the spacing between two adjacent rows is the same and is a first preset value; wherein, the rice planting points from the first row to the second to last row are symmetrically distributed in the left space and the right space on both sides of the partition; the first row is far away from the transition space, and the second to last row is close to the transition space; the spacing between the first row and the nearest wide side of the water trough is a second preset value; in the first row to the second to last row, the spacing between the rice planting points in each row close to the partition in the left space and the rice planting points in the right space is a third preset value; the last row is located in the transition space and its rice planting points are symmetrically distributed on both sides of the partition.

[0037] The height of the rice implanting and fixing device is smaller than the height of the water tank; the rice implanting and fixing device is coaxially integrally formed by a first pipe fitting and a second pipe fitting, the inner diameter of the first pipe fitting is larger than the inner diameter of the second pipe fitting, the outer diameter of the first pipe fitting is smaller than the outer diameter of the second pipe fitting, and the side wall of the second pipe fitting is provided with at least one through hole, which is located at a position of the second pipe fitting away from the first pipe fitting.

[0038] Preferably, the length of the water tank is 100±5cm, the width is 20±2cm, the height is 5±1cm, and the lengths of the left space and the right space are 85±5cm respectively; the first preset value is 20±2cm, the second preset value is 30±2cm, and the third preset value is 4±1cm; the length of the first pipe is 1.7±0.3cm, and the outer diameter is 1.7±0.3cm; the length of the second pipe is 1±0.2cm, and the outer diameter is 2±0.2cm; the aperture of the through hole is 0.3±0.1cm.

[0039] By adopting the above preferred solutions, the specific structural features of the device can be further optimized.

[0040] Compared with the prior art, the present invention can effectively overcome the problems existing in the existing measurement methods, fully consider the steric hindrance factor of rice, and be more in line with the actual field conditions; it can not only measure the expansion speed and expansion area of ​​the film-spreading oil, but also effectively measure and characterize the climbing performance of the film-spreading oil; the controllable water injection method of the water tank can effectively keep the water surface stable, which is more conducive to obtaining accurate measurement results. It has been verified in practice that the technical solution of the present invention can more effectively evaluate the performance of the film-spreading oil, and maintain consistency with the field effect, can judge the expansion performance of the surfactant system in the film-spreading oil, and is convenient for screening and designing suitable film-spreading oil formulations, which is ultimately conducive to the efficient application and labor saving of pesticides. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is an overall schematic diagram of the device of Example 1 of the present invention.

[0042] Figure 2 This is a schematic diagram of the size of the water tank in Example 1 of the present invention.

[0043] Figure 3 This is a schematic diagram of the specific distribution positions of rice planting points in the water tank of Example 1 of the present invention.

[0044] Figure 4 This is a schematic diagram of the rice implantation and fixing device according to Example 1 of the present invention.

[0045] Figure 5 Schematic diagrams of different angles and cross-sections of the rice implantation and fixing device according to Example 1 of the present invention.

[0046] Figure 6 This is a schematic diagram of a rice seedling being fixed in a rice implantation and fixing device according to Example 1 of the present invention. DETAILED DESCRIPTION

[0047] The inventor team found through research that the main reasons for the inconsistency between the indoor performance test results of the film-spreading oil and the field effect are: (1) The use of film-spreading oil in paddy fields is closely related to factors such as the steric hindrance of rice in paddy fields and the characteristics of field water, but these factors are not considered at all in the existing test methods, resulting in inconsistency between the indoor performance test results and the field effect. (2) The existing test method uses pouring water, which is not only inconvenient, but also causes the water surface to fluctuate for a long time. It is necessary to wait for the water surface to be completely stable before starting the test. However, in the actual test process, different operators have different judgment standards for the stability of the water surface, which also leads to inaccurate test results. (3) Film-spreading oils can contact harmful organisms at the base of rice (such as rice planthoppers, golden apple snails, and striped stem borers, which have a higher frequency of damage at 2 to 10 cm from the ground) due to their climbing effect. The climbing effect of film-spreading oils (usually ≥ 2 cm) will affect the control effect of pests and diseases. However, existing measurement methods are unable to measure and characterize the climbing performance of film-spreading oils, and thus are unable to identify film-spreading oils with insufficient climbing height. Such film-spreading oils will certainly not be effective when used in the field.

[0048] After conducting special research and development to address the above issues, the inventor team arrived at the technical solution of the present invention: a film-spreading oil agent performance testing device that simulates controllable drainage in a paddy field environment, and a film-spreading oil agent performance testing and evaluation method that simulates controllable drainage in a paddy field environment, the contents of which are shown in the above invention content.

[0049] In specific implementation, the film-spreading oil agent performance testing device for simulating controllable drainage in a paddy field environment and the film-spreading oil agent performance testing and evaluation method for simulating controllable drainage in a paddy field environment of the present invention respectively contain all the technical features recorded in the previous invention content (including the features of the preferred scheme), and the specific contents will not be repeated here.

[0050] The present invention will be described in further detail below with reference to the accompanying drawings and in combination with embodiments, but the present invention is not limited to the examples given.

[0051] Example 1

[0052] like Figure 1As shown, the film spreading oil performance testing device with controllable drainage simulating paddy field environment of this embodiment comprises a water tank 01 which is in the shape of a rectangular parallelepiped and has an open top. A partition 02 is provided in the water tank 01 to divide the internal space of the water tank 01 into a left space 03, a right space 04 and a transition space 05 connecting the left space 03 and the right space 04. The left space 03, the transition space 05 and the right space 04 are distributed in a "U" shape; a film spreading oil placement point 06 (i.e., the point marked with Δ in the figure) is provided at the end of the left space 03 or the right space 04 away from the transition space 05; rice planting points are respectively provided in the left space 03, the transition space 05 and the right space 04; a support rod 07 is provided next to the water tank 01, and a camera 08 is provided on the support rod 07, the camera 08 faces the water tank 01, and the signal output interface of the camera 08 is connected to an external computer 09 via a cable.

[0053] A water inlet hole 10 and a drain hole 11 are provided on the side wall of the water tank 01. A water storage tank 12 is provided outside the water tank 01. The water outlet of the water storage tank 12 has a valve. The water outlet of the water storage tank 12 is connected to the water inlet hole 10 of the water tank 01 through an inlet pipe 13. The drain hole 11 of the water tank 01 is connected to a drain pipe 14, and the drain pipe 14 has a valve.

[0054] like Figure 2 As shown, the length of the water tank 01 is 100 cm, the width is 20 cm, and the height is 5 cm. The lengths of the left space 03 and the right space 04 are 85 cm respectively, and the widths of the left space 03 and the right space 04 are the same.

[0055] like Figure 3 As shown, there are 14 rice planting points in the water trough 01, which are distributed in four rows, and the extension direction of each row coincides with the width direction of the water trough 01, and the spacing between two adjacent rows is 20 cm; among them, the first row, the second row, and the third row have 4 rice planting points respectively and are symmetrically distributed in the left space 03 and the right space 04 on both sides of the partition 02; the first row is far away from the transition space 05, the third row is close to the transition space 05, and the second row is located between the first row and the third row; the spacing between the first row and the nearest wide side of the water trough 01 is 30 cm; in the first to third rows, the spacing between the rice planting points in each row in the left space 03 close to the partition 02 and the rice planting points in the right space 04 close to the partition 02 is 4 cm; the fourth row is located in the transition space 05, has 2 rice planting points and is symmetrically distributed on both sides of the partition 02.

[0056] like Figure 4 , Figure 5As shown, each rice planting point is provided with a rice planting fixing device 15, the height of the rice planting fixing device 15 is less than the height of the water tank 01, and the rice planting fixing device 15 is coaxially formed by a first pipe 16 and a second pipe 17, the inner diameter of the first pipe 16 is greater than the inner diameter of the second pipe 17, the outer diameter of the first pipe 16 is less than the outer diameter of the second pipe 17, and the side wall of the second pipe 17 is provided with at least one through hole 18, and the through hole 18 is located at a position of the second pipe 17 away from the first pipe 16. For example, the length of the first pipe 16 is 1.7 cm, and the outer diameter is 1.7 cm; the length of the second pipe 17 is 1 cm, and the outer diameter is 2 cm; the aperture of the through hole 18 is 0.3 cm.

[0057] like Figure 6 As shown, when in use, the rice seedlings cultivated with the nutrient soil are placed into the rice implantation and fixing device 15 for fixing, and the rice seedlings are in the 3-leaf stage and the plant height is 10-15 cm.

[0058] Using the above device, the method for testing and evaluating the performance of the film-spreading oil agent for controlling drainage in a simulated paddy field environment of this embodiment includes the following steps:

[0059] The first step is to place rice seedlings with a plant height of 10 to 15 cm in each rice planting fixture 15 , and then place each rice planting fixture 15 on a corresponding rice planting point in the water tank 01 .

[0060] Step 2: inject preset test water (such as tap water, tap water containing 1% soil, etc.) into the water storage tank 12.

[0061] Step 3: Open the valve of the water outlet of the water storage tank 12, and inject water into the water tank 01 through the water inlet pipe 13 until the water overflows the rice planting fixture 15 and the water depth reaches a preset depth (such as 4 cm); turn on the camera 08 and the computer 09 to take photos or videos of the water tank 01 as needed.

[0062] Step 4: Add a preset dose (e.g., 20-40 μl) of the film-spreading oil to be tested to the film-spreading oil delivery point 06 of the water tank 01, and then observe the dispersion state, and measure the expansion speed, expansion area, and climbing height of the film-spreading oil on the stems of each rice seedling; during this process, take photos or videos as needed for measurement and analysis; after the measurement, open the valve of the drain pipe 14 to drain the water in the water tank 01.

[0063] The dispersion state is classified according to the following standards: Grade A: fully dispersed on the water surface, no precipitation; Grade B: dispersed on the water surface, the dispersibility is lower than Grade A; Grade C: dispersed on the water surface, the dispersibility is lower than Grade B, and there is sinking; Grade D: dispersed on the water surface, the dispersibility is lower than Grade C; Grade E: dispersed on the water surface, the dispersibility is lower than Grade D; Grade F: floats on the water surface without dispersion, and loads the water surface in the form of oil droplets or emulsions.

[0064] The specific method for determining the expansion speed and expansion area is: determine the expansion distance and time of the film-spreading oil to be tested on the water surface, and calculate according to the following formula:

[0065] Expansion speed = expansion distance / expansion time; the unit of expansion speed is cm / s; the expansion distance refers to the distance from the dosing position to the front end position of the film-spreading oil to be tested;

[0066] Expanded area = area of ​​rectangle + area of ​​irregular figure; the unit of expanded area is cm2; the diffusion surface of the film spreading oil to be tested is divided into rectangle and irregular figure, and the area of ​​rectangle is calculated according to its length and width. For irregular figure, first take a picture, trace its outline on the picture, and then use graphic processing software (such as Image J software) to calculate its area.

[0067] The specific method for determining the climbing pole height is: measuring the distance between the highest point of the climbing pole of the film-spreading oil agent to be tested on the stem of the rice seedling and the water surface, and the climbing pole height is obtained.

[0068] Step 5. Repeat steps 1 to 4 to measure different film spreading oils to be tested, and judge the performance of each film spreading oil to be tested based on the test results. The specific process is: first, take the film spreading oil with a climbing pole height ≥ 2 cm (preferably 2 to 10 cm) as a qualified product, and then compare the expansion speed, expansion area and climbing pole height of each qualified product, and take the film spreading oil with the fastest expansion speed, the largest expansion area and the highest climbing pole height as the final test result.

[0069] By using the above test and evaluation method, this embodiment can screen different surfactant systems in the film-spreading oil formulation, in order to achieve efficient and labor-saving application of pesticides.

[0070] This embodiment uses the following verification examples to verify the implementation effect of the above device and test evaluation method.

[0071] Verification Example 1:

[0072] The test dose of the film spreading oil is 30 μl, and the preset test water in the water tank is tap water containing 1% soil. The film spreading oil to be tested is fluphenazine film spreading oil, and its formula composition is shown in Table 1; performance tests are carried out respectively under the conditions of considering rice steric hindrance and not considering rice steric hindrance, wherein when considering rice steric hindrance, the test is carried out according to the test evaluation method of the above text embodiment, and when not considering rice steric hindrance, the test evaluation method of the above text embodiment is removed from the rice implantation fixture and tested, in both cases, the dispersion state is observed, and only the expansion speed and expansion area are measured, and the evaluation results are shown in Table 1.

[0073] Table 1. Details and results of Verification Example 1

[0074]

[0075] Note 1: Dispersion state classification A: Rapid dispersion on the water surface, no precipitation; B: Dispersion on the water surface, good dispersion; C: Dispersion on the water surface, a little sinking; D: Basically dispersed on the water surface, good dispersion; E: Dispersion on the water surface, general dispersion; F: Floating on the water surface without dispersion, loaded on the water surface in the form of oil droplets or emulsions. These classifications are specific details of the dispersion state standards mentioned above.

[0076] Note 2: NMP: 1-methyl-2-pyrrolidone.

[0077] From the above results, it can be seen that the difference between the two cases of considering rice steric hindrance and not considering rice steric hindrance is mainly reflected in the expansion area and expansion speed. Compared with not considering rice steric hindrance, the expansion area is 19.06% less and the expansion speed is 22.72% slower when considering rice steric hindrance. There is a big difference between the two.

[0078] Verification Example 2:

[0079] The test dosage of the film spreading oil agent is 30 μl, and the preset test water in the water tank is tap water containing 1% soil.

[0080] The film spreading oils to be tested were 2 formulations of 5% epoxiconazole film spreading oils, and their formulation compositions are shown in Table 2. The tests were conducted according to the test evaluation method of the above text embodiment, the dispersion state was observed, the expansion speed, expansion area and climbing height were measured, and the evaluation results are shown in Table 2.

[0081] Table 2. Details and results of Verification Example 2

[0082]

[0083] Note 1: Dispersion state classification A: Rapid dispersion on the water surface, no precipitation; B: Dispersion on the water surface, good dispersion; C: Dispersion on the water surface, a little sinking; D: Basically dispersed on the water surface, good dispersion; E: Dispersion on the water surface, general dispersion; F: Floating on the water surface without dispersion, loaded on the water surface in the form of oil droplets or emulsions. These classifications are specific details of the dispersion state standards mentioned above.

[0084] Note 2: NMP: 1-methyl-2-pyrrolidone.

[0085] From the above results, it can be seen that the climbing height of the 5% fluphenazine film-spreading oil agent in formulation 1 is greater than 2 cm, while the climbing height of the 5% fluphenazine film-spreading oil agent in formulation 2 is less than 2 cm, and in terms of dispersion state, expansion speed, expansion area and climbing height, formulation 1 is significantly better than formulation 2.

[0086] Verification Example 3:

[0087] The test dosage of the film spreading oil agent is 35 μl, and the preset test water in the water tank is tap water containing 1% soil.

[0088] The film spreading oils to be tested were 4% dinotefuran film spreading oils of two formulations, and their formulation compositions are shown in Table 3. The test was carried out according to the test evaluation method of the above text embodiment to measure the expansion speed, expansion area and climbing pole height, and the evaluation results are shown in Table 3.

[0089] Table 3. Details and results of verification example 3

[0090]

[0091] Note: Dispersion state classification A: Rapid dispersion on the water surface, no precipitation; B: Dispersion on the water surface, good dispersion; C: Dispersion on the water surface, a little sinking; D: Basically dispersed on the water surface, good dispersion; E: Dispersion on the water surface, average dispersion; F: Floating on the water surface without dispersion, loaded on the water surface in the form of oil droplets or emulsions. These classifications are specific details of the dispersion state standards mentioned above.

[0092] From the above results, it can be seen that the climbing height of the 4% dimethoate film-spreading oil in formulation 1 is greater than 2 cm, while the climbing height of the 4% dimethoate film-spreading oil in formulation 2 is close but still less than 2 cm, and in terms of expansion speed, expansion area and climbing height, formulation 1 is significantly better than formulation 2.

[0093] Verification Example 4:

[0094] The rice planthopper test was conducted with the 4% dimethoate film-spreading oil of the two formulations of Verification Example 3. The specific contents are as follows: the 4% dimethoate film-spreading oil of the two formulations of Verification Example 3 was used in a field test at a dosage of 150 ml and 200 ml per mu, and the parallel jumping disk pat method was used for sampling. Ten points were patted in each plot, and the planthoppers in the middle and lower parts of the rice stems of two holes of rice were patted in each point in a white porcelain plate (specification: 30 cm×40 cm), and the total number of rice planthoppers was counted. The base number was checked before the application of the pesticide, and the number of residual live insects was investigated 1 day, 3 days, 7 days and 14 days after the application of the pesticide, and the control effect was calculated according to the following formula.

[0095]

[0096] The results of the field efficacy test are shown in Table 4 below.

[0097] Table 4. Results of Verification Example 4

[0098]

[0099] Note: The numbers in the table are the average values ​​of 3 repetitions, and the letters after the control effect numbers indicate the significant difference (DMRT).

[0100] From the above results, it can be seen that the 4% dinotefuran film-spreading oil in formulation 1 has a significantly better control effect on rice planthoppers than the 4% dinotefuran film-spreading oil in formulation 2, which is consistent with the indoor performance test results of Verification Example 3.

[0101] Based on the above embodiments, it can be seen that the present invention can effectively overcome the problems existing in the existing measurement methods, fully consider the steric hindrance factor of rice, and be more in line with the actual field conditions; it can not only measure the expansion speed and expansion area of ​​the film-spreading oil, but also effectively measure and characterize the climbing performance of the film-spreading oil; the controllable water injection method of the water tank can effectively keep the water surface stable, which is more conducive to obtaining accurate measurement results. It has been verified in practice that the technical solution of the present invention can more effectively evaluate the performance of the film-spreading oil, and maintain consistency with the field effect, can judge the expansion performance of the surfactant system in the film-spreading oil, and is convenient for screening and designing suitable film-spreading oil formulations, which is ultimately conducive to the efficient application and labor saving of pesticides.

[0102] In addition to the above embodiments, the present invention may also have other implementation modes. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the present invention.

Claims

1. A method for testing and evaluating the performance of a film-spreading oil agent for controlled drainage in a simulated paddy field environment, characterized in that: A film spreading oil performance test device with controllable drainage simulating paddy field environment is adopted, the device comprises a water tank in the shape of a rectangular parallelepiped with an open top surface, a partition is arranged in the water tank to divide the internal space of the water tank into a left space, a right space and a transition space connecting the left space and the right space, and the left space, the transition space and the right space are distributed in a "U" shape; a film spreading oil delivery point is arranged at the end of the left space or the right space away from the transition space; rice planting points are arranged in the left space, the transition space and the right space respectively; each rice planting point is provided with a rice planting fixing device respectively; a support rod is arranged beside the water tank, a camera is arranged on the support rod, the camera faces the water tank, and the signal output interface of the camera is connected to an external computer via a cable; a water inlet hole and a drain hole are arranged on the side wall of the water tank, a water storage tank is arranged outside the water tank, the water outlet of the water storage tank is provided with a valve, the water outlet of the water storage tank is connected with the water inlet hole of the water tank through a water inlet pipe, the drain hole of the water tank is connected with the drain pipe, and the drain pipe has a valve; The method comprises the following steps: The first step is to place rice seedlings with a plant height of 10 to 15 cm in each rice planting fixture, and then place each rice planting fixture on a corresponding rice planting point in the water tank; Step 2: Inject preset test water into the water tank; Step 3: Open the valve at the water outlet of the water storage tank and pour water into the water tank through the water inlet pipe until the water overflows the rice planting fixture and the water depth reaches the preset depth; turn on the camera and computer to take photos or videos of the water tank as needed; Step 4: Add a preset dose of the film spreading agent to be tested to the film spreading agent placement point of the water tank, then observe the dispersion state, and measure the expansion speed, expansion area, and climbing height of the film spreading agent on the stems of each rice seedling; during this process, take photos or videos as needed for measurement and analysis; after the measurement, open the valve of the drain pipe to drain the water in the water tank; Step 5. Repeat steps 1 to 4 to measure different film spreading oils to be tested, and judge the performance of each film spreading oil to be tested based on the test results. The specific process is: first, take the film spreading oil with a climbing pole height ≥ 2 cm as a qualified product, and then compare the expansion speed, expansion area and climbing pole height of each qualified product, and take the film spreading oil with the fastest expansion speed, the largest expansion area and the highest climbing pole height as the final test result.

2. The method for testing and evaluating the performance of a film-spreading oil agent for controlled drainage in a simulated paddy field environment according to claim 1, characterized in that: In the third step, the preset depth was 4 ± 0.5 cm; In the fourth step, the preset dose is 20 to 40 μl.

3. The method for testing and evaluating the performance of a film-spreading oil agent for controlled drainage in a simulated paddy field environment according to claim 1, characterized in that: In the fourth step, the dispersion state is classified according to the following criteria: Grade A: fully dispersed on the water surface without precipitation; Grade B: dispersed on the water surface, with lower dispersibility than Grade A; Grade C: dispersed on the water surface, with lower dispersibility than Grade B, and tends to sink; Grade D: dispersed on the water surface, with lower dispersibility than Grade C; Grade E: dispersed on the water surface, with lower dispersibility than Grade D; Class F: Floating on the water surface without dispersion, carrying the water surface in the form of oil droplets or emulsions; The specific method for determining the expansion speed and expansion area is: determine the expansion distance and time of the film-spreading oil to be tested on the water surface, and calculate according to the following formula: Expansion speed = expansion distance / expansion time; the unit of expansion speed is cm / s; the expansion distance refers to the distance from the dosing position to the front end position of the film-spreading oil to be tested; Extended area = area of ​​rectangle + area of ​​irregular shape; the unit of extended area is cm 2 ; Divide the diffusion surface of the film-spreading oil to be tested into rectangles and irregular shapes. For rectangles, calculate the area according to their length and width. For irregular shapes, first take a picture, copy its outline on the picture, and then use graphics processing software to calculate its area; The specific method for determining the climbing pole height is: measuring the distance between the highest point of the climbing pole of the film-spreading oil agent to be tested on the stem of the rice seedling and the water surface, and the climbing pole height is obtained.

4. The method for testing and evaluating the performance of a film-spreading oil agent with controllable drainage in a simulated paddy field environment according to claim 1 is characterized in that, in the first step, rice seedlings cultivated with nutrient soil are used to fix the rice seedlings in a rice implantation fixture using the nutrient soil; in the second step, the test water is preset to be tap water, or tap water containing 1±0.5% by weight of soil; in the fifth step, the film-spreading oil agent with a climbing pole height of 2 to 10 cm is regarded as a qualified product.

5. The method for testing and evaluating the performance of a film-spreading oil agent for controlled drainage in a simulated paddy field environment according to any one of claims 1 to 4, characterized in that: The height of the rice planting fixture is less than the height of the water tank; The rice implantation and fixing device is coaxially integrally formed by a first tube and a second tube. The inner diameter of the first tube is larger than the inner diameter of the second tube, and the outer diameter of the first tube is smaller than the outer diameter of the second tube. The side wall of the second tube is provided with at least one through hole, and the through hole is located at a position of the second tube away from the first tube.

6. The method for testing and evaluating the performance of a film-spreading oil agent for controlled drainage in a simulated paddy field environment according to claim 5, characterized in that: The width of the left space and the right space of the trough are the same; the rice planting points in the trough are distributed into at least four rows, each row has at least two rice planting points, the extension direction of each row coincides with the width direction of the trough, and the spacing between two adjacent rows is the same and is a first preset value; wherein, the rice planting points from the first row to the second to last row are symmetrically distributed in the left space and the right space on both sides of the partition; the first row is far away from the transition space, and the second to last row is close to the transition space; the spacing between the first row and the nearest wide side of the trough is a second preset value; in the first row to the second to last row, the spacing between the rice planting points of each row in the left space close to the partition and the rice planting points in the right space close to the partition is a third preset value; the last row is located in the transition space and its rice planting points are symmetrically distributed on both sides of the partition.

7. The method for testing and evaluating the performance of a film-spreading oil agent for controlled drainage in a simulated paddy field environment according to claim 6, characterized in that: The length of the water tank is 100±5cm, the width is 20±2cm, the height is 5±1cm, and the lengths of the left space and the right space are 85±5cm respectively; the first preset value is 20±2cm, the second preset value is 30±2cm, and the third preset value is 4±1cm; the length of the first pipe fitting is 1.7±0.3cm, and the outer diameter is 1.7±0.3cm; the length of the second pipe fitting is 1±0.2cm, and the outer diameter is 2±0.2cm; the aperture of the through hole is 0.3±0.1cm.

8. A film spreading oil performance testing device for simulating paddy field environment and controllable drainage, comprising a rectangular water tank with an open top, characterized in that: A partition is arranged in the water tank to divide the internal space of the water tank into a left space, a right space and a transition space connecting the left space and the right space, and the left space, the transition space and the right space are distributed in a "U" shape; a film spreading oil agent placement point is arranged at the end of the left space or the right space away from the transition space; rice planting points are respectively arranged in the left space, the transition space and the right space; each rice planting point is respectively provided with a rice planting fixing device; a support rod is arranged beside the water tank, and a camera is arranged on the support rod, the camera faces the water tank, and the signal output interface of the camera is connected to an external computer via a cable; a water inlet hole and a drain hole are arranged on the side wall of the water tank, and a water storage tank is arranged outside the water tank, the water outlet of the water storage tank is provided with a valve, the water outlet of the water storage tank is connected with the water inlet hole of the water tank through a water inlet pipe, and the drain hole of the water tank is connected with the drain pipe, and the drain pipe has a valve.

9. The film-spreading oil performance testing device for controlling drainage in simulated paddy field environment according to claim 8 is characterized in that: The width of the left space and the right space of the water trough are the same; the rice planting points in the water trough are distributed into at least four rows, each row has at least two rice planting points, the extension direction of each row coincides with the width direction of the water trough, and the spacing between two adjacent rows is the same and is a first preset value; wherein the rice planting points from the first row to the second to last row are symmetrically distributed in the left space and the right space on both sides of the partition; the first row is far away from the transition space, and the second to last row is close to the transition space; the spacing between the first row and the nearest wide side of the water trough is a second preset value; in the first row to the second to last row, the spacing between the rice planting points in each row close to the partition in the left space and the rice planting points in each row close to the partition in the right space is a third preset value; the last row is located in the transition space and its rice planting points are symmetrically distributed on both sides of the partition; The height of the rice implanting and fixing device is smaller than the height of the water tank; the rice implanting and fixing device is coaxially integrally formed by a first pipe fitting and a second pipe fitting, the inner diameter of the first pipe fitting is larger than the inner diameter of the second pipe fitting, the outer diameter of the first pipe fitting is smaller than the outer diameter of the second pipe fitting, and the side wall of the second pipe fitting is provided with at least one through hole, which is located at a position of the second pipe fitting away from the first pipe fitting.

10. The film-spreading oil performance testing device for simulating controlled drainage in a paddy field environment according to claim 9, characterized in that: The length of the water tank is 100±5cm, the width is 20±2cm, the height is 5±1cm, and the lengths of the left space and the right space are 85±5cm respectively; the first preset value is 20±2cm, the second preset value is 30±2cm, and the third preset value is 4±1cm; the length of the first pipe fitting is 1.7±0.3cm, and the outer diameter is 1.7±0.3cm; the length of the second pipe fitting is 1±0.2cm, and the outer diameter is 2±0.2cm; the aperture of the through hole is 0.3±0.1cm.

Images