Comprehensive solenopsis invicta prevention and control method combining cold smoke machine and lime nitrogen

Abstract

The invention relates to the technical field of insect prevention and control, and particularly discloses a cold smoke machine and lime nitrogen combined red imported fire ant comprehensive prevention and control method which comprises the following steps: manually positioning a red imported fire ant nest, and determining a treatment area; the preparation method comprises the following steps: mixing the solenopsis invicta proportioning drug, water and a special atomizing agent for the cold range hood according to a mass ratio of 1: 4: 20 to prepare a solution, and filling the solution into a liquid storage tank of the cold range hood; a smoke cooling machine is started, the solution is converted into smoke with the atomized particle size being 1-5 microns through an atomization system, and the smoke is diffused into the ant nest under the conditions that the injection pressure is 0.5-1.5 MPa and the diffusion speed is larger than or equal to 5 m / s; after smoke diffusion is completed, lime nitrogen is scattered to the surface of the treatment area according to the dosage of 50-200 g / m < 2 >, and a plastic film is used for covering and sealing; calcium and nitrogen fertilizer are supplemented after lime nitrogen is decomposed, the soil structure is improved, and solenopsis invicta is prevented from nesting again; through the diffusivity of the cold smoke machine and the lasting insect killing effect of lime nitrogen, the agent can rapidly permeate into the ant nest in a short time.

Description

Technical Field

[0001] The present invention belongs to the technical field of insect control, and in particular relates to a comprehensive control method for red imported fire ants by combining a smoke cooler with lime nitrogen. Background Art

[0002] The red fire ant is a dangerous alien pest that poses serious threats to agricultural and forestry production, public safety, human health and the ecological environment. It is listed as one of the 100 most dangerous invasive pests in the world. At present, the specific technical measures in the prevention and control of red fire ants mainly include the following: powder nest destruction method, poison bait killing method, liquid medicine infusion method, two-stage treatment method, and red fire ant anti-escape rapid treatment technology.

[0003] However, although the above schemes have a good control effect on red fire ants, since they all use pesticides for treatment, they will cause certain harm to the soil and ecological environment, and there are certain limitations on their use. Summary of the Invention

[0004] The purpose of the present invention is to provide a comprehensive control method for red imported fire ants by combining a smoke cooler with lime nitrogen to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A comprehensive control method for red imported fire ants using a smoke cooler combined with lime nitrogen, comprising:

[0007] S1. Manually locate the red imported fire ant nest and determine the treatment area;

[0008] S2, mixing the fire ant formula, water and the smoke cooler special atomizer in a mass ratio of 1:4:20 to prepare a solution and loading it into the liquid storage tank of the smoke cooler;

[0009] S3. Start the smoke machine and convert the solution into smoke with a size of 1-5 μm through the atomization system. Then diffuse the smoke into the interior of the ant nest at a spray pressure of 0.5-1.5 MPa and a diffusion speed of ≥5 m / s.

[0010] S4. After the smoke is diffused, press 50-200g / m 2 Sprinkle lime nitrogen on the surface of the treated area and cover it with plastic film;

[0011] S5. After the lime nitrogen decomposes, calcium and nitrogen fertilizers are added to improve the soil structure and prevent red fire ants from building nests again.

[0012] Preferably, the environmental conditions in step S3 are: ambient temperature 10-35° C., soil moisture 30%-60%, and wind speed less than 3 m / s.

[0013] Preferably, the active ingredient of the fire ant formula is calcium cyanamide, and the dosage of the smoke cooler special atomizer is 10-50mL / m 2 .

[0014] Preferably, the lime nitrogen is spread in step S4 by directly injecting it into the ant nest or evenly spreading it on the soil surface.

[0015] Preferably, the survival rate and activity signs of red imported fire ants are detected by trap method or bait method on the 1st day, 3rd day, 7th day and 28th day after step S5.

[0016] Preferably, the calcium content, nitrogen content, pH value and porosity of the soil are detected in the first month and the third month after step S5.

[0017] Preferably, the plastic film covering time is 24-72 hours.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) Through the diffusion capacity of the cold smoke machine and the long-lasting insecticidal effect of lime nitrogen, it can quickly penetrate the interior of the ant nest in a short time, significantly improving the killing efficiency of red fire ants, reducing the use of a single agent, and reducing the cost of raw materials. The parameters of the cold smoke machine (such as atomized particle size, injection pressure, diffusion speed, etc.) can be precisely adjusted according to the size of the ant nest and soil conditions, which is convenient for precise control and improves the flexibility and adaptability of operation.

[0020] (2) The coordinated application of lime nitrogen not only enhances the prevention and control effect, but also achieves soil improvement and ecological restoration. The cyanamide compounds produced by the decomposition of lime nitrogen after spreading can inhibit the activity of red imported fire ants. The calcium ions and nitrogen generated by its hydrolysis significantly improve soil fertility, effectively neutralize acidic soil, and improve soil aggregate structure and porosity, which not only blocks the re-invasion of red imported fire ants, but also creates favorable conditions for plant growth. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Flowchart of the present invention. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Example 1:

[0024] See also Figure 1 As shown, a comprehensive control method for red imported fire ants using a smoke cooler combined with lime nitrogen comprises the following steps:

[0025] S1. Manually locate the core area of the red imported fire ant nest, record the nest dimensions (major axis, minor axis, height), and clear debris around the nest to ensure the treatment area is free of obstacles.

[0026] S2. Mix the fire ant compound, water, and adjuvant in the correct proportions and pour the mixture into the liquid storage tank of the smoke machine. Start the smoke machine and adjust the atomization system to produce uniform smoke particles of 1-5 μm. Inject the smoke into the ant nest through the injection system at a speed of ≥ 5 m / s for 10 minutes, allowing the smoke to penetrate into hidden areas.

[0027] S3. Dig a circular trench (20 cm deep) around the ant nest and evenly spread lime nitrogen (100 g / m 2 ), irrigate the application area with clean water (about 5L / m 2 ), promote the hydrolysis of lime nitrogen, immediately cover the treated area with plastic film, press the edges into the ditch and compact with soil to prevent gas volatilization;

[0028] S4, press 150g / m 2 Spread the lime nitrogen evenly on the surface of the treated area and the opening of the ant nest, cover with plastic film and press the edges tightly, and seal for 48 hours to ensure that the cyanamide compounds are fully released;

[0029] S5. After the film is removed, natural precipitation promotes the hydrolysis of lime nitrogen.

[0030] In one embodiment of the present invention, the environmental conditions in step S3 are: ambient temperature 25° C., soil moisture 45%, and wind speed 1.5 m / s.

[0031] In one embodiment of the present invention, the active ingredient of the fire ant formula is calcium cyanamide, which is granular and has a purity of ≥90%. The smoke cooler special atomizer is a non-ionic surfactant, and the dosage is 10-50 mL / m 2 .

[0032] In one embodiment of the present invention, the lime nitrogen is spread in step S4 by directly injecting it into the ant nest or evenly spreading it on the soil surface.

[0033] In one embodiment of the present invention, the survival rate and activity signs of red imported fire ants are detected by trap method or bait method on the 1st day, 3rd day and 7th day after step S5;

[0034] Fresh ham sausage slices were placed in the ant nest area 1 day, 7 days, 14 days, and 28 days after treatment, and the feeding behavior of red fire ants was observed after 30 minutes.

[0035] In one embodiment of the present invention, the calcium content, nitrogen content, pH value and porosity of the soil are detected in the first month and the third month after step S5.

[0036] In one embodiment of the present invention, the plastic film covering time is 24-72 hours.

[0037] Experimental example:

[0038] Test address: Yangxi Village and Dongsheng Village, Dongxiao Street, Jindong District, Jinhua City, Zhejiang Province

[0039] Adopt the green control technology of "smoke cooler + lime nitrogen", the specific steps are as follows:

[0040] As shown in Table 1, 21 red imported fire ant nests (nest long axis 19-71 cm, anthill height 3-15 cm) were manually located. Materials were prepared: a cold smoke machine, lime nitrogen, a special formula for red imported fire ants, a cold smoke machine atomization aid, plastic film, and fresh ham.

[0041] Table 1: 21 red fire ant nests

[0042]

[0043]

[0044] Mix the fire ant compound with the atomizing agent in proportion, convert the liquid medicine into uniform smoke through a cold smoke machine, and spray it into the core area of the ant nest, so that the smoke penetrates into the hidden nest. After the smoke treatment, dig a trench around the ant nest, pour lime nitrogen into the nest opening and the trench, and fill with clean water to promote the reaction. Finally, cover and seal with plastic film, and press soil on the edges to fix it;

[0045] On the 1st, 7th, 14th and 28th day after treatment, ham sausage slices were placed in the ant nest area to attract red imported fire ants, and their feeding behavior was observed, as shown in Table 2:

[0046] Table 2: Results of trapping and excavating 21 red imported fire ant nests

[0047]

[0048]

[0049] As shown above, after one day of cold smoke machine + lime nitrogen treatment, only a small number of red fire ants were attracted to four ant nests; after seven days of treatment, only a few red fire ants were attracted to one ant nest; after 14 days of treatment, 21 red fire ant nests were completely eliminated, with no living ants left; after a two-week follow-up, no living ants were found.

[0050] The control effect of red imported fire ants is calculated as shown in Table 3:

[0051] Table 3: Control effects of fire ants in 21 ant nests

[0052] time Control effect (%) After 1D 81.0％ After 7D 96.0％ After 14D 100％ After 28D 100％

[0053] Control effect = number of ant nests that did not attract red imported fire ants after treatment / total number of ant nests before treatment × 100%;

[0054] From the above, we can see that after 1 day of treatment, the prevention effect on live ant nests is 81.0%, and after 7 days of treatment, the prevention effect on live ant nests is 96.0%; after 14 days and 28 days of treatment, the prevention effect on live ant nests reaches 100%. The smoke machine + lime nitrogen treatment requires a certain amount of time to take effect, and the longer the treatment time, the better the effect.

[0055] According to the long-term monitoring of the treated soil in the embodiment, the specific experimental data are shown in Table 4:

[0056] Table 4: Data table of soil improvement effect over time

[0057] Detection indicators Before treatment (baseline value) 1 month after treatment 3 months after treatment 6 months after treatment Calcium content (%) 0.85 1.02(+20％) 1.20(+41％) 1.18(+39％) Nitrogen content (mg / kg) 1200 1380(+15％) 1450(+21％) 1420(+18％) pH 5.8 (acidic) 6.5 7.0 (neutral) 7.1 Porosity (%) 35 39(+11％) 41(+17％) 40(+14％)

[0058] From the above, we can see that the calcium ions (Ca 2+ ) and nitrogen (NH3, NO3) significantly improved soil fertility, increased calcium content promoted the formation of soil aggregates, nitrogen supplementation was beneficial to plant growth, and alkaline substances (such as Ca(OH)2) generated by the hydrolysis of lime nitrogen effectively neutralized soil acidity, and the pH value increased from 5.8 to 7.0, improving the crop root environment. The cementing effect of calcium ions enhanced the soil aggregate structure, the porosity increased by 14%-17%, and the soil aeration and water retention capacity were improved. Data 6 months after treatment showed that the calcium, nitrogen content and porosity remained at a high level, and the pH value was stable.

[0059] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A comprehensive control method for red imported fire ants using a combination of a smoke cooler and lime nitrogen, characterized in that: The following steps are involved: S1. Manually locate the red imported fire ant nest and determine the treatment area; S2, mixing the fire ant medicine, water and the smoke cooler-specific atomizer in a mass ratio of 1:4:20 to prepare a solution and loading it into the liquid storage tank of the smoke cooler; S3. Start the smoke machine and convert the solution into smoke with a particle size of 1-5 μm through the atomization system. Then diffuse the smoke into the ant nest at a spray pressure of 0.5-1.5 MPa and a diffusion speed of ≥5 m / s. S4. After the smoke is diffused, press 50-200g / m 2 Sprinkle lime nitrogen on the surface of the treated area and cover it with plastic film; S5. After the lime nitrogen decomposes, calcium and nitrogen fertilizers are added to improve the soil structure and prevent red fire ants from building nests again.

2. The method for comprehensive prevention and control of fire ants using a combination of a smoke cooler and lime nitrogen according to claim 1, characterized in that: The environmental conditions in step S3 are: ambient temperature 10-35° C., soil moisture 30%-60%, and wind speed less than 3 m / s.

3. The method for comprehensive prevention and control of fire ants using a combination of a smoke cooler and lime nitrogen according to claim 1, characterized in that: The active ingredient of the fire ant formula is calcium cyanamide, and the dosage of the cold smoke machine special atomizer is 10-50mL / m 2 .

4. The method for comprehensive prevention and control of fire ants using a combination of a smoke cooler and lime nitrogen according to claim 1, characterized in that: The lime nitrogen in step S4 is spread directly into the ant nest or evenly spread on the soil surface.

5. The method for comprehensive prevention and control of fire ants using a combination of a smoke cooler and lime nitrogen according to claim 1, characterized in that: On the 1st day, 3rd day, 7th day and 28th day after step S5, the survival rate and activity signs of red imported fire ants are detected by trap method or bait method.

6. The method for comprehensive prevention and control of fire ants using a combination of a smoke cooler and lime nitrogen according to claim 1, characterized in that: The calcium content, nitrogen content, pH value and porosity of the soil are tested in the first month and the third month after step S5.

7. The method for comprehensive prevention and control of fire ants using a combination of a smoke cooler and lime nitrogen according to claim 1, characterized in that: The plastic film covering time is 24-72 hours.

Images