Method for efficiently preventing and treating first-generation chilo suppressalis by feeding transplanting pesticide

Abstract

The invention belongs to the technical field of crop disease and insect pest control, and relates to a method for efficiently controlling first-generation chilo suppressalis by feeding transplanting pesticide. The method mainly comprises the following steps: firstly, scientifically selecting an insecticide which is good in uptake conductivity, long in lasting period, low in drug resistance level and high in safety, then, carrying out insecticide treatment on a rice seedling bed in a conventional insecticide application mode such as spraying or broadcasting before transplanting the rice seedlings, and then, carrying out mechanical transplanting on the rice seedlings subjected to the insecticide treatment in a field. Compared with the existing chilo suppressalis prevention and control technology, the method provided by the invention has the advantages that the investigation process for the appropriate pesticide application period is omitted, the operation area is obviously reduced, the influence of complex conditions such as field terrain, geology and environment on the pesticide application operation is avoided, the seedlings can be ensured to be robust without insect pests, and the pesticide consumption is reduced. The method for efficiently preventing and treating the first-generation chilo suppressalis by feeding the pesticide before grafting is simple and convenient to operate, time-saving, labor-saving, economical and efficient, and has a wide application prospect in the aspects of green prevention and control of rice diseases and insect pests, agricultural emission reduction, sustainable agriculture and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of crop disease and insect pest control, and relates to a method for efficiently controlling the first generation of Chilo suppressalis by delivering a medicine. Background Art

[0002] Borer borer [ Chilo suppressalis Walker] is one of the most serious pests that harm rice in my country. In recent years, due to factors such as changes in farming systems, mixed planting of single and double seasons, and replacement of rice varieties, the population of the rice stem borer has shown a clear upward trend. my country mainly adopts chemical control measures to control the rice stem borer. However, irrational use methods such as not using the medicine according to the dosage and not using it at the right time have caused the rice stem borer to develop resistance to a variety of major control agents. There is a relative lack of high-efficiency control agents, and the green control of the rice stem borer faces huge challenges.

[0003] Conventional pesticide control technology is often to apply pesticides when the insects are present, that is, to treat the insects with pesticides. Since the rice stem borer starts to bore into the rice stems from the second-instar larvae, conventional control technology needs to accurately grasp the appropriate control period from the peak of egg hatching to before the second-instar larvae bore into the rice stems (usually about 7 days). Otherwise, the larvae will feed in the rice stems, and the chance of contacting sufficient pesticides will be greatly reduced, and the control effect will be significantly reduced. In addition, when there are multiple moth peaks in the field, it is difficult to ensure that the application period will meet the appropriate control period. Therefore, due to the short appropriate control period of the rice stem borer and the overlapping generations in the field, it is difficult for farmers to accurately grasp the appropriate time to apply pesticides in production practice. Conventional pesticide control technology has the disadvantages of being inefficient, time-consuming, and labor-intensive.

[0004] The peak egg-laying period of the first-generation Chilo suppressalis is usually from the early rice seedling stage to the early stage of the first field, and the quality of its prevention and control directly affects the base number and degree of occurrence of Chilo suppressalis throughout the year. Therefore, the construction of prevention and control technology for the first-generation early rice Chilo suppressalis can not only prevent the spread of Chilo suppressalis eggs in the seedling field (seedling bed) to the field after hatching, but also play a preventive and control role for Chilo suppressalis in the rice seedling and tillering stages, which can effectively reduce the amount and frequency of pesticide use, reduce production costs, and reduce the base number and degree of occurrence of Chilo suppressalis in the field, which is of great significance for the efficient and green prevention and control of Chilo suppressalis and the sustainable development of agriculture. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the above-mentioned existing rice stem borer prevention and control technology, and provide a method for efficiently preventing and controlling the first generation of rice stem borer by delivering pesticides. The method has good prevention and control effect and a long lasting effect. It changes the traditional "spraying pesticides when insects appear" to "waiting for insects with pesticides", solves the problems of high operating requirements, low efficiency, and time-consuming in traditional technologies, and achieves the purpose of reducing the number of pesticide applications, reducing production costs, alleviating ecological pressure on farmland, and improving agricultural economic benefits.

[0006] The technical solution provided by the present invention is as follows: A method for efficiently controlling the first generation of Chilo suppressalis by delivering a drug, comprising the following steps: spraying or spreading the drug on the rice seedling field before transplanting the rice seedlings; and transplanting the treated seedlings into the field by machine; the drug is one of chlorantraniliprole, tetrazopyrid, and cyantraniliprole.

[0007] Furthermore, the time for applying the agent is 1-7 days before transplanting the seedlings.

[0008] Furthermore, the time for applying the agent is 1-3 days before transplanting the seedlings.

[0009] Furthermore, the dosage of the agent is 50%-100% of the recommended dosage for the field.

[0010] Furthermore, the dosage of the agent is 75% of the recommended dosage for the field.

[0011] Furthermore, in low-resistance areas, the dosage of the pesticide is 50% of the recommended field dosage; in medium-resistance areas, the dosage of the pesticide is equivalent to the recommended field dosage; and in high-resistance areas, no pesticide is required.

[0012] Furthermore, the low resistance area is 5.0 < resistance multiple ≤ 10; the medium resistance area is 10.0 < resistance multiple ≤ 100.0; the high resistance area is resistance multiple > 100.0; the calculation method of the resistance multiple is: Resistance multiple = LC of the tested population 50 / LC of sensitive baseline 50 Among them, LC 50 Refers to the median lethal concentration.

[0013] Furthermore, 1 mu of rice seedlings treated with pesticides can be used for machine planting in 80-100 mu of fields.

[0014] Furthermore, rice seedlings from one mu of rice field treated with chemicals can be used for machine planting in 90 mu of fields.

[0015] Furthermore, the method comprises the following steps: (1) 1-7 days before transplanting the seedlings, spray or broadcast the pesticide on the seedling field using conventional spraying methods such as manual spraying, motorized spraying, and soil mixing.

[0016] (2) The treatment agent should be an insecticide with good systemic conductivity, long effective period, low resistance level and high safety, such as chlorantraniliprole, tetrazopyralid, cyantraniliprole, etc.

[0017] (3) In low-resistance areas (5.0 < resistance multiple ≤ 10.0), the dosage of the pesticide is 50% of the recommended field dosage; in medium-resistance areas (10.0 < resistance multiple ≤ 100.0), the dosage of the pesticide is equivalent to the recommended field dosage; in high-resistance areas (resistance multiple > 100.0), if there are no other pesticides with strong systemic properties and good long-lasting effects, this technology is not recommended. The recommended field dosage refers to the pesticide registration label, and the resistance multiple is calculated according to the following formula: Resistance multiple = LC of the tested population 50 / LC of sensitive baseline 50 ; Among them, LC 50 Refers to the median lethal concentration; (4) Strictly follow the pesticide application technical specifications and use pesticides scientifically and safely. One mu of rice seedlings in the nursery field treated with pesticides can supply 80-100 mu of rice seedlings for machine planting in the field.

[0018] Wherein, in step (1), the application time is 1-7 days before transplanting the seedlings, and the preferred time is 1-3 days before transplanting the seedlings.

[0019] Wherein, in step (2), the treatment agent is one or a combination of chlorantraniliprole, tetrazobactam, and cyantraniliprole.

[0020] Wherein, in step (3), the dosage of the agent is 50%-100% of the recommended dosage for field use, and the preferred dosage is 75% of the recommended dosage for field use.

[0021] Among them, in step (4), 1 mu of rice seedlings in the rice seedling field treated with the pesticide are used for machine transplanting in 80-100 mu of fields, and the preferred machine transplanting area of ​​rice seedlings in 1 mu of rice seedling field treated with the pesticide is 90 mu.

[0022] The invention also provides application of the method in rice planting.

[0023] The method for efficiently controlling the first generation of the Chilo suppressalis by using the medicine provided by the invention has a control effect of 94.5%-100% on the Chilo suppressalis 21 days after the medicine is applied, a control effect of 91.2%-100% on the Chilo suppressalis 30 days after the medicine is applied, and a control effect of 82.1%-99.18% on the Chilo suppressalis 40 days after the medicine is applied. Beneficial Effects

[0024] The peak egg-laying period of the first-generation Chilo suppressalis is usually from the early rice seedling stage to the early stage of the first field, and the quality of its prevention and control directly affects the base number and degree of occurrence of Chilo suppressalis throughout the year. Therefore, the construction of prevention and control technology for the first-generation early rice Chilo suppressalis can not only prevent the spread of Chilo suppressalis eggs in the seedling field (seedling bed) to the field after hatching, but also play a preventive and control role for Chilo suppressalis in the rice seedling and tillering stages, which can effectively reduce the amount and frequency of pesticide use, reduce production costs, and reduce the base number and degree of occurrence of Chilo suppressalis in the field, which is of great significance for the efficient and green prevention and control of Chilo suppressalis and the sustainable development of agriculture.

[0025] Conventional technology requires an insect survey before applying pesticides, and determines the appropriate period for application (from the peak egg hatching period to the peak period of second-instar larvae). The workload is large, and the appropriate period for application is short. There is serious overlap of generations in the field population. It is difficult to ensure that the application period is in the appropriate period for prevention and control, and the labor cost is high. This method applies pesticides 1-7 days before transplanting seedlings, and does not need to consider the appropriate period for application of pesticides using conventional technology. It saves the investigation process for the appropriate period for application of pesticides, and the operation is simpler. Compared with conventional technology for applying pesticides in large fields, this method applies pesticides to the seedling field, which significantly reduces the operating area and avoids the influence of complex conditions such as field topography, geology, and environment on the application of pesticides, so the operation is more time-saving and labor-saving; this method can ensure that the seedlings are strong and free of pests, prevent, reduce or delay the damage of the striped stem borer, and build the biodiversity of natural enemies as early as possible, so it is more economical and efficient.

[0026] The method for efficiently controlling the first generation of rice stem borer with a drug provided by the invention has broad application prospects in green prevention and control of rice diseases and insect pests, agricultural emission reduction, sustainable agriculture, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The results of the trial of sending drugs to control the first generation of Chilo suppressalis in Lujiang, Anhui: (A) dieback rate, (B) control effect.

[0028] Figure 2 The results of the trial of sending drugs to control the first generation of Chilo suppressalis in Zhongxiang, Hubei: (A) shoot dieback rate, (B) control effect. DETAILED DESCRIPTION

[0029] The following examples all evaluate the test effect of the provided marriage medicine for efficiently controlling the first generation of Chilo suppressalis according to the following method: The effect of preventing and controlling the Chilo suppressalis is calculated according to formulas (1) and (2):

[0030]

[0031] Where: CK The dead shoot rate of the treatment area after blank control treatment; PT It is the dieback rate of the treated area after the drug treatment.

[0032] The present invention will be further described below in conjunction with specific embodiments. Example 1

[0033] (1) 1, 3, 5, and 7 days before transplanting the seedlings, treat the seedling field with pesticides by conventional spraying or broadcasting.

[0034] (2) The treatment agents are chlorantraniliprole suspension and chlorantraniliprole granules.

[0035] (3) The dosage of the active ingredient is 1500 g / hm2 2 .

[0036] (4) One mu of rice seedlings from the rice nursery treated with pesticides can be used for machine transplanting in 100 mu of fields.

[0037] (5) The content of chlorantraniliprole (mg / kg fresh rice plant) was measured in the rice seedlings to be transplanted on the day of transplanting and in the rice seedlings in the field 7 days after transplanting.

[0038] In this embodiment, regardless of whether the granules are broadcast or the suspension is sprayed, the content of chlorantraniliprole in the seedlings to be planted on the day of transplanting and in the rice seedlings in the field 7 days after transplanting tends to increase with the delay of time before transplanting, and the highest content is found when the drug is applied 1-3 days before transplanting.

[0039] Table 1: Chlorantraniliprole content in rice plants at different application times (mg / Kg fresh rice plant) Example 2

[0040] (1) Three days before transplanting the seedlings, the seedling field should be sprayed with pesticides using conventional spraying methods.

[0041] (2) The treatment agent is chlorfenapyr.

[0042] (3) The dosage of the active ingredient is 3000 g / hm2 2 .

[0043] (4) The test site is Lujiang, Anhui.

[0044] (5) One mu of rice seedlings from the rice nursery treated with pesticides can be used for machine transplanting in 100 mu of fields.

[0045] The insect control effect of Chilo suppressalis was calculated according to formula (1) and (2).

[0046] The control effect of this embodiment on the striped stem borer is 94.50% 21 days after the application of the drug, the control effect on the striped stem borer is 92.80% 30 days after the application of the drug, and the control effect on the striped stem borer is 89.00% 40 days after the application of the drug. Example 3

[0047] (1) Three days before transplanting the seedlings, the seedling field should be sprayed with pesticides using conventional spraying methods.

[0048] (2) The treatment agent is chlorfenapyr.

[0049] (3) The dosage of the active ingredient is 1500 g / hm2 2 .

[0050] (4) The test site is Lujiang, Anhui.

[0051] (5) One mu of rice seedlings from the rice nursery treated with pesticides can be used for machine transplanting in 100 mu of fields.

[0052] The insect control effect of Chilo suppressalis was calculated according to formula (1) and (2).

[0053] The control effect of this embodiment on the striped stem borer was 94.50% 21 days after the application of the drug, 91.20% 30 days after the application of the drug, and 82.10% 40 days after the application of the drug. Example 4

[0054] (1) Three days before transplanting the seedlings, the seedling field should be sprayed with pesticides using conventional spraying methods.

[0055] (2) The treatment agent is chlorfenapyr.

[0056] (3) The dosage of the active ingredient is 3000 g / hm2 2 .

[0057] (4) The test site is Zhongxiang, Hubei (5) One mu of rice seedlings from the rice nursery treated with pesticides can be used for machine transplanting in 100 mu of fields.

[0058] The insect control effect of Chilo suppressalis was calculated according to formula (1) and (2).

[0059] The control effect of this embodiment on the striped stem borer was 100.00% 21 days after the application of the drug, 100.00% 30 days after the application of the drug, and 99.18% 40 days after the application of the drug. Example 5

[0060] (1) Three days before transplanting the seedlings, the seedling field should be sprayed with pesticides using conventional spraying methods.

[0061] (2) The treatment agent is chlorfenapyr.

[0062] (3) The dosage of the active ingredient is 1500 g / hm2 2 .

[0063] (4) The test site is Zhongxiang, Hubei.

[0064] (5) One mu of rice seedlings from the rice nursery treated with pesticides can be used for machine transplanting in 100 mu of fields.

[0065] The insect control effect of Chilo suppressalis was calculated according to formula (1) and (2).

[0066] The control effect of this example on the striped stem borer was 96.23% 21 days after the application of the drug, 100.00% 30 days after the application of the drug, and 97.44% 40 days after the application of the drug. Example 6

[0067] (1) Two days before transplanting the seedlings, treat the seedling field with pesticides by conventional broadcasting.

[0068] (2) The treatment agent is chlorfenapyr.

[0069] (3) The dosage of the active ingredient is 4500 g / hm2 2 .

[0070] (4) The test site is Duchang, Jiangxi Province.

[0071] (5) One mu of rice seedlings from the rice nursery treated with pesticides can be used for machine transplanting in 100 mu of fields.

[0072] The insect control effect of Chilo suppressalis was calculated according to formula (1) and (2).

[0073] The control effect of this embodiment on the striped stem borer was 80.31% 20 days after the application of the drug, 79.46% 30 days after the application of the drug, and 81.36% 40 days after the application of the drug. Example 7

[0074] (1) Two days before transplanting the seedlings, treat the seedling field with pesticides by conventional broadcasting.

[0075] (2) The treatment agent is chlorfenapyr.

[0076] (3) The dosage of the active ingredient is 4500 g / hm2 2 .

[0077] (4) The test site is Tongcheng, Anhui Province.

[0078] (5) One mu of rice seedlings from the rice nursery treated with pesticides can be used for machine transplanting in 100 mu of fields.

[0079] The insect control effect of Chilo suppressalis was calculated according to formula (1) and (2).

[0080] The control effect of this embodiment on the striped stem borer is 100% 20 days after the application of the drug, the control effect on the striped stem borer is 100.00% 30 days after the application of the drug, and the control effect on the striped stem borer is 100% 40 days after the application of the drug. Example 8

[0081] (1) Two days before transplanting the seedlings, treat the seedling field with pesticides by conventional spraying.

[0082] (2) The treatment agent is chlorfenapyr.

[0083] (3) The dosage of the active ingredient is 4500 g / hm2 2 .

[0084] (4) The test site is Tongcheng, Anhui Province.

[0085] (5) One mu of rice seedlings from the rice nursery treated with pesticides can be used for machine transplanting in 100 mu of fields.

[0086] The insect control effect of Chilo suppressalis was calculated according to formula (1) and (2).

[0087] The control effect of this embodiment on the striped stem borer is 100% 20 days after the application of the drug, the control effect on the striped stem borer is 100.00% 30 days after the application of the drug, and the control effect on the striped stem borer is 100% 40 days after the application of the drug.

[0088] Comparative Example Conventional field application method: Wu Cong et al. used 30 g / hm 2 Chlorantraniliprole was applied twice, and the control effect on Chilo suppressalis was only 24.58% 20 days after application (Wu Cong et al., Pesticides, 2023); Zhu Juandi used 60 g / hm 2 Chlorantraniliprole was applied twice, and the control effect on the stem borer was only 44.68% 10 days after the application (Zhu Juandi, Heilongjiang Grain, 2023); Wu Yao et al. used 30g / hm 2 Chlorantraniliprole was applied once, and the control effect on Chilo suppressalis was 79.10% 21 days after application (Wu Yao et al., Anhui Agricultural Science Bulletin, 2023); Zhang Zairen et al. used 31.5 g / hm 2 Chlorantraniliprole was applied once, and the control effect on Chilo suppressalis was 76.80% 21 days after application (Zhang Zairen et al., Hunan Agricultural Sciences, 2022); Liu Dingrong et al. used 22.5 g / hm 2 Chlorantraniliprole was applied once, and the control effect on Chilo suppressalis was 85.69% 20 days after application (Liu Dingrong et al., Modern Agricultural Science and Technology, 2022); Zheng Yong used 45 g / hm 2 After one application of chlorfenapyr, the protection efficiency against the Chilo suppressalis was only 72.64% 23 days after the application (Zheng Yong, Guangxi Plant Protection, 2019).

[0089] Example using 15 g / hm 2After one application of chlorantraniliprole, the control effect on the Chilo suppressalis was greater than 94.50% 21 days after the application, greater than 91.20% 30 days after the application, and greater than 82.10% 40 days after the application. Compared with conventional application technology, this method can reduce the amount of pesticides by at least 50%, and the field control effect is still better than conventional application technology, with obvious advantages of more labor-saving, more pesticide-saving, more efficient and safer.

Claims

1. A method for efficiently controlling the first generation of Chilo suppressalis by using a drug delivery agent, characterized in that: The following steps are involved: Before transplanting rice seedlings, the rice seedling field is sprayed or spread with pesticides; the treated seedlings are machine transplanted in the field; the pesticide is one of chlorantraniliprole, tetrazopyrid, and cyantraniliprole.

2. The method for efficiently controlling the first generation of Chilo suppressalis using a drug according to claim 1, characterized in that: The time for applying the agent is 1-7 days before transplanting the seedlings.

3. The method for efficiently controlling the first generation of Chilo suppressalis using a drug according to claim 1, characterized in that: The time for applying the agent is 1-3 days before transplanting the seedlings.

4. The method for efficiently controlling the first generation of Chilo suppressalis by using a medicine for marriage according to claim 1, characterized in that: The dosage of the agent is 50%-100% of the recommended dosage for field use.

5. The method for efficiently controlling the first generation of Chilo suppressalis by using a medicine for marriage according to claim 1, characterized in that: The dosage of the agent is 75% of the recommended dosage for field use.

6. The method for efficiently controlling the first generation of Chilo suppressalis by using a drug according to claim 1, characterized in that: In low-resistance areas, the dosage of the pesticide is 50% of the recommended dosage for the field; in medium-resistance areas, the dosage of the pesticide is equal to the recommended dosage for the field; No pesticide application is required in highly resistant areas.

7. The method for efficiently controlling the first generation of Chilo suppressalis by using a medicine for marriage according to claim 1, characterized in that: The low resistance area is 5.0 < resistance multiple ≤ 10; the medium resistance area is 10.0 < resistance multiple ≤ 100.0; the high resistance area is resistance multiple > 100.0; the calculation method of the resistance multiple is: Resistance multiple = LC of the tested population 50 / LC of sensitive baseline 50 ; Among them, LC 50 Refers to the median lethal concentration.

8. The method for efficiently controlling the first generation of Chilo suppressalis by using a medicine for marriage according to claim 1, characterized in that: One mu of rice seedlings in the nursery field treated with pesticides can be used for machine transplanting in 80-100 mu of fields.

9. The method for efficiently controlling the first generation of Chilo suppressalis by using a drug according to claim 1, characterized in that: One mu of rice seedlings from the rice field treated with chemicals can be used for machine planting in 90 mu of fields.

10. Use of the method according to any one of claims 1 to 9 in rice planting.

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