Pesticide composition and application thereof

Abstract

The invention belongs to the technical field of pesticide disinfestation, and discloses a pesticide composition and application thereof.The pesticide composition comprises an active ingredient A and an active ingredient B. The active ingredient A is a compound shown in the formula I. The structure of the compound shown in the formula I is shown in the specification, and the active ingredient B is acetoprole, pyrafluprole or pyriprole; the mass ratio of the active component A to the active component B is (1: 30)-(35: 1). The pesticide composition disclosed by the invention has a remarkable synergistic effect on hemiptera pests of agricultural crops, and the development of pest resistance is slowed down while the dosage is reduced.

Description

Technical Field

[0001] This invention belongs to the field of pesticide insecticide technology and discloses a pesticide composition and its application. Background Technology

[0002] Compound I is a novel compound independently developed by the applicant, belonging to the isoxazoline class of insecticides. It exhibits excellent biological activity against Lepidoptera, Homoptera, and Thysanoptera pests and is not prone to cross-resistance with existing diamide compounds. Its structural formula is shown below:

[0003]

[0004] Rice planthoppers belong to the order Hemiptera and the family Planthopperidae. They mainly include three types: brown planthoppers, white-backed planthoppers, and gray planthoppers. Among them, brown planthoppers and white-backed planthoppers are typical migratory pests and are listed in the first batch of Class A crop pests and diseases in my country. Brown planthoppers and white-backed planthoppers not only directly pierce and suck the rice, causing large-scale "planthopper burn" and "burrowing," but they also serve as hosts for five viral diseases: rice straw dwarf disease, rice toothed leaf dwarf disease, rice stripe leaf blight, rice black-streaked dwarf disease, and southern rice black-streaked dwarf disease. These pests severely affect rice growth, causing lodging, reduced yields, or even crop failure, posing a serious threat to rice production.

[0005] Chemical control is the main measure to control this pest, but rice planthoppers have long developed resistance to many insecticides. To screen for highly effective and low-toxicity pesticides for controlling rice planthoppers, this invention rationally combines the compound of Formula I with three chemical agents with different mechanisms of action. The compound's efficacy against rice planthoppers was determined through indoor bioassays and field efficacy trials. The indoor bioactivity and field control effects of these pesticides were compared, aiming to provide a reference for the scientific control of rice planthoppers and delaying the development of pesticide resistance. Summary of the Invention

[0006] Based on the above, the present invention provides an insecticidal composition that has a significant synergistic effect on common hemiptera pests of crops, improves control efficacy, has good rapid effect and long-lasting effect, and can be applied to the integrated management of agricultural pests, reducing pesticide residues in agricultural products while mitigating environmental pollution.

[0007] The present invention also provides an application of an insecticidal composition for the control of hemiptera pests.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a pesticide composition comprising active ingredient A and active ingredient B, wherein active ingredient A is a compound of formula I, and the structure of the compound of formula I is shown below: (Formula I), wherein the active ingredient B is acetoprole, pyrafluprole or pyriprole; the mass ratio of the active ingredient A to the active ingredient B is 1:30 to 35:1, or any value within the above range.

[0009] Furthermore, the active ingredient B is acetoprole, and the mass ratio of active ingredient A to active ingredient B is 1:20 to 22:1, or any value within the above range.

[0010] The active ingredient B is pyrafluprole, and the mass ratio of the active ingredient A to the active ingredient B is 1:26 to 30:1, or any value within the above range.

[0011] The active ingredient B is pyriprole, and the mass ratio of active ingredient A to active ingredient B is 1:30 to 20:1, or any value within the above range.

[0012] Furthermore, the active ingredient B is acetoprole, and the mass ratio of active ingredient A to active ingredient B is 1:20 to 16:1, or any value within the above range.

[0013] The active ingredient B is pyrafluprole, and the mass ratio of the active ingredient A to the active ingredient B is 1:18 to 25:1, or any value within the above range.

[0014] The active ingredient B is pyriprole, and the mass ratio of active ingredient A to active ingredient B is 1:20 to 15:1, or any value within the above range.

[0015] Furthermore, the active ingredient in the pesticide composition accounts for 1% to 70% of the total weight of the pesticide composition, or any value within the above range.

[0016] Furthermore, in addition to the active ingredient, the pesticide composition also includes pesticide-permitted auxiliary ingredients, which are selected from one or more of wetting agents, dispersants, emulsifiers, thickeners, disintegrants, antifreeze agents, defoamers, solvents, preservatives, stabilizers, synergists, or carriers.

[0017] Furthermore, the pesticide composition is prepared into an agriculturally permissible formulation, wherein the formulation is a solid or liquid formulation.

[0018] Furthermore, the solid formulation is a water-dispersible granule or a wettable powder; the liquid formulation is a suspension, emulsifiable concentrate, microemulsion, dispersible oil suspension, or water emulsion.

[0019] The present invention also discloses the application of the pesticide composition described above for the control of hemiptera pests.

[0020] Furthermore, the hemiptera pest mentioned is the rice planthopper.

[0021] The beneficial effects of this invention are as follows:

[0022] The pesticide composition of the present invention has a significant synergistic effect on target pests, requires a low dosage, effectively reduces the amount of pesticides used, reduces pesticide residues on crops, alleviates environmental pollution, and slows down the development of pesticide resistance in pests. Detailed Implementation

[0023] To make the technical solution, objectives and advantages of the present invention clearer, the present invention is described with reference to the following specific embodiments. However, the present invention can be implemented in various forms and should not be limited to the embodiments described herein.

[0024] The pesticide composition of the present invention can be diluted or used directly by the user before application. Its formulation can be prepared using processing methods known to those skilled in the art.

[0025] Formulation preparation method:

[0026] 1. Suspension preparation method: According to the formula ratio, the active ingredients, surfactants and other functional additives are placed in the reaction vessel in sequence, water is added and mixed evenly, and then subjected to high-speed shearing, wet sand milling and finally homogenization filtration to obtain the suspension product.

[0027] 2. Preparation method of emulsifiable concentrate: According to the formula ratio, add the measured active ingredients, solvent and co-solvent into the mixing tank and stir to dissolve them. Then add the emulsifier, and use the remaining solvent to make up the balance. Stir evenly in the mixing tank, and filter to obtain the emulsifiable concentrate required by the present invention.

[0028] 3. Preparation method of dispersible oil suspension: According to the formula ratio, the active ingredients, surfactants and other functional additives are placed in the reaction vessel in sequence, oil is added and mixed evenly, and then subjected to high-speed shearing, wet sand milling and finally homogenization filtration to obtain the dispersible oil suspension product.

[0029] 4. Preparation method of water-dispersible granules: According to the formula ratio, add the active ingredients to the carrier, and add surfactants and other functional additives to it. Mix, and after air jet pulverization, add 10-25% water. Then knead, granulate, dry and sieve to obtain water-dispersible granules; or spray water, granulate and dry the pulverized powder in a fluidized bed granulator, and then sieve to obtain the product.

[0030] 5. Preparation method of wettable powder: According to the formula ratio, the active ingredients, dispersant, wetting agent and filler are mixed and stirred evenly in a mixer. After being pulverized by an air jet mill, they are mixed evenly again to prepare the wettable powder of the composition of the present invention.

[0031] Formulation preparation example:

[0032] Preparation Example 1: 24% Pyrafluprole (Formula I) suspension (3:1)

[0033] Formula composition: 18% Formula I compound, 6% pyrafluprole, 1% sodium lignosulfonate, 2% fatty alcohol polyoxyethylene ether sulfate, 3% fatty alcohol polyoxyethylene ether phosphate, 0.25% xanthan gum, 1% magnesium aluminum silicate, 5% ethylene glycol, 0.1% sodium p-hydroxybenzoate, 0.5% silicone oil, deionized water to make up the balance.

[0034] Preparation Example 2: 7% Pyrafluprole emulsifiable concentrate of Formula I (6:1)

[0035] Formulation composition: 6% Formula I compound, 1% pyrafluprole, 12% DMF, 10% phenethylphenol polyoxyethylene polyoxypropylene ether, 2% sodium dodecyl sulfate, 15% propylene carbonate, and tricresyl to make up the balance.

[0036] Preparation Example 3: 8% Pyrafluprole Formula I Dispersible Oil Suspension (1:3)

[0037] Formula composition: 2% Formula I compound, 6% pyrafluprole, 1% alkylphenol polyoxyethylene ether, 15% glycerol fatty acid ester polyoxyethylene ether phosphate, 3% sodium dodecyl sulfate, 2% sodium dioctyl succinate sulfonate, 1% magnesium aluminum silicate, 1% Tesco 869, corn oil to make up the balance.

[0038] Preparation Example 4: 21% Pyrafluprole (Formula I) water-dispersible granules (1:6)

[0039] Formula composition: 3% Formula I compound, 18% pyrafluprole, 10% lignin sulfonate, 4% sodium dodecylbenzene sulfonate, 2% naphthalene sulfonate, 5% silica, 25% starch, and kaolin to make up the balance.

[0040] Preparation Example 5: 32% formula I compound pyrafluprole wettable powder (15:1)

[0041] Formula composition: 30% Formula I compound, 2% pyrafluprole, 2% sodium lignosulfonate, 4% naphthalenesulfonate formaldehyde condensate, 2% bleaching powder BX, 5% silica, and kaolin to make up the balance.

[0042] Preparation Example 6: 22% Pyriprole (Formula I) suspension (1:10)

[0043] Formula composition: 2% Formula I compound, 20% pyriprole, 1% alkyl aryl polyoxyethylene ether polyoxypropylene ether, 5% arylphenol polyoxyethylene ether phosphate, 1% sodium lignosulfonate, 0.25% xanthan gum, 5% glycerol, 0.1% sodium benzoate, 0.5% silicone oil, deionized water to make up the balance.

[0044] Preparation Example 7: 6% Pyriprole emulsifiable concentrate of Formula I (1:5)

[0045] Formula composition: 1% Formula I compound, 5% pyriprole, 18% N-methylpyrrolidone, 10% glycerol fatty acid ester polyoxyethylene ether, 2% sodium dodecyl sulfate, 10% DMF, and methyl oleate to make up the balance.

[0046] Preparation Example 8: 9% Pyriprole Formula I Dispersible Oil Suspension (2:1)

[0047] Formula composition: 6% Formula I compound, 3% pyriprole, 5% castor oil polyoxyethylene ether, 10% sorbitan oleate polyoxyethylene ether, 1% calcium dodecylbenzene sulfonate, 1% sodium polycarboxylate, 1% naphthalene sulfonate formaldehyde condensate, soybean oil to make up the balance.

[0048] Preparation Example 9: 30% Pyriprole (Formula I) water-dispersible granules (5:1)

[0049] Formula composition: 25% Formula I compound, 5% pyriprole, 10% naphthalene sulfonate formaldehyde condensate, 2% stretching powder BX, 2% sodium dodecylbenzene sulfonate, 8% white sugar, and kaolin to make up the balance.

[0050] Preparation Example 10: 22% wettable powder of formula I compound pyriprole (10:1)

[0051] Formula composition: 20% Formula I compound, 2% pyriprole, 2% sodium lignosulfonate, 5% fatty alcohol polyoxyethylene ether sulfate, 6% sodium polynaphthalene sulfonate, 10% kaolin, 12% silica, and bentonite to make up the balance.

[0052] Preparation Example 11: 16% Formula I compound acetoprole suspension (1:7)

[0053] Formula composition: 2% Formula I compound, 14% acetoprole, 1% glycerol fatty acid ester polyoxyethylene ether, 3% tristyrylphenol polyoxyethylene ether, 2% fatty alcohol polyoxyethylene ether phosphate, 1% sodium polycarboxylate, 1.5% magnesium aluminum silicate, 0.15% carboxyethyl cellulose, 0.5% Kathon, 5% ethylene glycol, 1% silicone oil, deionized water to make up the balance.

[0054] Preparation Example 12: 10% Emulsifiable Concentrate of Formula I Compound acetoprole (1:1)

[0055] Formulation composition: 5% Formula I compound, 5% acetoprole, 12% EO / PO block copolymer, 12% acetophenone, 10% N-octylpyrrolidone, 1% calcium dodecylbenzenesulfonate, xylene to make up the balance.

[0056] Preparation Example 13: 15% Formula I compound acetoprole dispersible oil suspension (1:4)

[0057] Formula composition: 3% Formula I compound, 12% acetoprole, 2% lignin sulfonate, 12% phenylethylphenol polyoxyethylene polyoxypropylene ether, 2% triphenylethylphenol polyoxyethylene ether, 2% sodium dodecyl sulfate, 1% silica, 1% organobentonite, 18% 200# solvent oil, methyl oleate to make up the balance.

[0058] Preparation Example 14: 27% Formula I compound acetoprole water-dispersible granules (8:1)

[0059] Formula composition: 24% Formula I compound, 3% acetoprole, 10% naphthalene sulfonate formaldehyde condensate, 2% succinate sulfonate, 1% sodium alkyl polyoxyethylene ether sulfonate, 10% ammonium sulfate, starch to make up the balance.

[0060] Preparation Example 15: 20% wettable powder of Formula I compound acetoprole (4:1)

[0061] Formula composition: 16% Formula I compound, 4% acetoprole, 4% sodium dodecyl sulfate, 2% sodium alkyl polyoxyethylene ether sulfonate, 2% BX bleaching powder, 5% silica, and kaolin to make up the balance.

[0062] Example 1: Indoor bioactivity test of brown planthopper

[0063] Test basis: The test was conducted in accordance with NY / T 1154.11-2008 "Guidelines for Indoor Bioassay Tests of Pesticides - Insecticides - Part 11: Rice Stalk Impregnation Method".

[0064] Experimental target: mid-3rd instar nymphs of the brown planthopper.

[0065] Test reagents: Compound of Formula I, acetoprole, pyrafluprole, and pyriprole technical grade.

[0066] Experimental Method: Rice stem immersion method. Nymphs in a consistent physiological state were selected as standard test insects. Healthy, uniformly tillering rice seedlings cultured in the laboratory were dug up with their roots, washed, and cut into 10cm long rooted rice stems. These stems were placed on filter paper and dried in a cool, shaded place until no visible water remained on the surface. The technical grade pesticide was prepared into a stock solution using a suitable solvent. Five mass concentration gradients were then prepared using a 0.1% Tween 80 aqueous solution in equal proportions. The prepared rice stems were immersed in the prepared pesticide solution for 30 seconds, removed, and dried. The roots were wrapped with moistened absorbent cotton to retain moisture, and then wrapped with plastic wrap. Three rice stems were placed in each test tube. Each treatment was replicated four times, with a control treatment without pesticide. The test insects were transferred into the test tubes using a pipette, 15 insects per tube, and the tube opening was covered with gauze. The treated test insects were raised and observed under conditions of (25±1)℃, relative humidity of 60%~80%, and photoperiod of L:D=(16:8)h.

[0067] Experimental investigation: After 48 hours of experimental treatment, the mortality of the test insects was checked, and the total number of insects and the number of dead insects were recorded.

[0068] Calculation method:

[0069] Calculate the mortality rate for each treatment based on the survey data. Use the following formula:

[0070]

[0071] In the formula:

[0072] P – Mortality rate, expressed as a percentage (%);

[0073] K represents the number of dead insects, in heads;

[0074] N represents the total number of insects treated, in units of heads.

[0075]

[0076] In the formula:

[0077] P1 – Corrected mortality rate, in percentage (%);

[0078] P t —The mortality rate is expressed as a percentage (%).

[0079] P0 – Mortality rate in the blank control group, expressed as a percentage (%).

[0080] If the control mortality rate is <5%, no correction is needed; if the control mortality rate is between 5% and 20%, correction should be performed according to the corrected mortality rate formula; if the control mortality rate is >20%, the trial needs to be repeated.

[0081] The toxicity regression equation and LC were obtained using a statistical analysis system. 50 The co-toxicity coefficient (CTC value) of the mixture is used to evaluate the activity of the test reagent on the biological material.

[0082]

[0083] In the formula:

[0084] ATI – Actual Measured Toxicity Index of Mixtures;

[0085] S – LC50 of standard insecticides 50 The unit is milligrams per liter (mg / L);

[0086] M – LC of the mixture 50 The unit is milligrams per liter (mg / L).

[0087] TTI = TI A ×P A +TI B ×P B

[0088] In the formula:

[0089] TTI – Theoretical Toxicity Index of Mixtures;

[0090] TI A —A. Toxicity index of drug A;

[0091] P A —Percentage content of drug A in the mixture, expressed as percentage (%);

[0092] TI B —Toxicity index of drug B;

[0093] P B —Percentage content of agent B in the mixture, expressed as percentage (%).

[0094]

[0095] In the formula:

[0096] CTC – Cotoxicity Coefficient;

[0097] ATI – Actual Measured Toxicity Index of Mixtures;

[0098] TTI – Theoretical Toxicity Index of Mixtures.

[0099] The co-toxicity coefficient (CTC) of the compound formulation was ≥120, indicating a synergistic effect; CTC ≤80, indicating an antagonistic effect; and 80 < CTC < 120, indicating an additive effect. Indoor activity test results:

[0100] Table 1. Results of indoor bioactivity assays of compound I combined with pyrafluprole on rice brown planthopper.

[0101]

[0102]

[0103] Table 1 shows the results of the indoor experiments. The rational combination of compound I with pirafluprole within a certain mass ratio range exhibits a synergistic effect against brown planthoppers. When the mass ratio of compound I to pirafluprole is 1:26–30:1, the co-toxicity coefficient against brown planthoppers is greater than 120, indicating a synergistic effect. When the mass ratio is 1:18–25:1, the co-toxicity coefficient against brown planthoppers is greater than 130, showing a significant synergistic effect. When the mass ratio is 1:12–25:1, the co-toxicity coefficient against brown planthoppers is greater than 140, showing a remarkable synergistic effect.

[0104] Among them, the mass ratios of compound I to pirafluprole of 1:26, 1:18, 1:12, 1:6, 1:3, 3:1, 6:1, 15:1, 25:1, and 30:1 showed a co-toxicity coefficient greater than 120 against brown planthoppers, indicating a synergistic effect; the mass ratios of compound I to pirafluprole of 1:18, 1:12, 1:6, 1:3, 3:1, 6:1, 15:1, and 25:1 showed a co-toxicity coefficient greater than 130 against brown planthoppers, indicating a significant synergistic effect; and the mass ratios of compound I to pirafluprole of 1:12, 1:6, 1:3, 3:1, 6:1, 15:1, and 25:1 showed a co-toxicity coefficient greater than 140 against brown planthoppers, indicating a significant synergistic effect.

[0105] Table 2 shows the results of indoor bioactivity assays of compound I combined with pyriprole on rice brown planthopper.

[0106]

[0107] Table 2 shows the results of the indoor experiments. The appropriate combination of compound I and pyriprole within a certain mass ratio range exhibits a synergistic effect against brown planthoppers. When the mass ratio of compound I to pyriprole is 1:30–20:1, the co-toxicity coefficient against brown planthoppers is greater than 120, indicating a synergistic effect. When the mass ratio is 1:20–15:1, the co-toxicity coefficient against brown planthoppers is greater than 130, showing a significant synergistic effect. When the mass ratio is 1:15–15:1, the co-toxicity coefficient against brown planthoppers is greater than 140, showing a remarkable synergistic effect.

[0108] Among them, the mass ratios of compound I to pyriprole of 1:30, 1:20, 1:15, 1:10, 1:5, 2:1, 5:1, 10:1, 15:1, and 20:1 showed a co-toxicity coefficient greater than 120 against brown planthoppers, indicating a synergistic effect; the mass ratios of compound I to pyriprole of 1:20, 1:15, 1:10, 1:5, 2:1, 5:1, 10:1, and 15:1 showed a co-toxicity coefficient greater than 130 against brown planthoppers, indicating a significant synergistic effect; and the mass ratios of compound I to pyriprole of 1:15, 1:10, 1:5, 2:1, 5:1, 10:1, and 15:1 showed a co-toxicity coefficient greater than 140 against brown planthoppers, indicating a significant synergistic effect.

[0109] Table 3 shows the results of the indoor bioactivity assay of compound I combined with acetoprole on rice brown planthopper.

[0110]

[0111] Table 3 shows the results of the indoor experiments. The appropriate combination of compound I with acetoprole within a certain mass ratio range exhibits a synergistic effect against brown planthoppers. When the mass ratio of compound I to acetoprole is 1:20–22:1, the co-toxicity coefficient against brown planthoppers is greater than 120, indicating a synergistic effect. When the mass ratio is 1:20–16:1, the co-toxicity coefficient against brown planthoppers is greater than 130, showing a significant synergistic effect. When the mass ratio is 1:15–8:1, the co-toxicity coefficient against brown planthoppers is greater than 140, showing a remarkable synergistic effect.

[0112] Among them, the mass ratio of compound I to acetoprole of 1:20, 1:15, 1:7, 1:4, 1:1, 4:1, 8:1, 16:1, and 22:1 showed a co-toxicity coefficient greater than 120 against brown planthopper, indicating a synergistic effect; the mass ratio of compound I to acetoprole of 1:20, 1:15, 1:7, 1:4, 1:1, 4:1, 8:1, and 16:1 showed a co-toxicity coefficient greater than 130 against brown planthopper, indicating a significant synergistic effect; and the mass ratio of compound I to acetoprole of 1:15, 1:7, 1:4, 1:1, 4:1, and 8:1 showed a co-toxicity coefficient greater than 140 against brown planthopper, indicating a significant synergistic effect.

[0113] Example 2: Field efficacy test for controlling rice planthoppers

[0114] Experimental site: Paddy field in Cangtou Village, Baohua Town, Jurong City, Jiangsu Province. The soil in the experimental site was loam, with a pH of 6.8, an organic matter content of 1.9%, and a soil fertility of medium to high.

[0115] Experimental target: rice brown planthopper.

[0116] Experimental crop: Rice (Jiuyou Yuehe Simiao).

[0117] Experimental plots: The experiment consisted of 8 treatments, with each experimental plot randomly arranged. Each treatment was replicated 4 times, and each plot had an area of ​​30m². 2 Protected lines are set up between the small sections.

[0118] Experimental Methods: A Gongnong-16 backpack sprayer was used to uniformly spray the base of the rice stems and leaves once during the initial peak of rice planthopper infestation. Before application, the initial planthopper population was assessed. The number of surviving planthoppers was assessed 1, 3, and 10 days after application. Ten sampling points were taken in each plot using a parallel skip sampling method, with two rice clumps sampled at each point, resulting in a total planthopper population survey of 20 rice clumps per plot. Simultaneously, the presence of phytotoxicity was checked, and the type and severity of phytotoxicity were recorded.

[0119] Methods for calculating drug efficacy:

[0120]

[0121] Results of field efficacy trials:

[0122] Table 4. Field efficacy trials for controlling rice planthoppers.

[0123]

[0124] The experimental investigation found no adverse effects of the above-mentioned test agents on rice, and no adverse effects of the agents on other non-target organisms were found during the above experiments.

[0125] Field efficacy trials showed that compound I combined with acetoprole, pyrafluprole, or pyriprole exhibited excellent control effects against brown planthoppers in rice. Each compound formulation showed rapid and long-lasting efficacy against brown planthoppers; investigations conducted at 1, 3, and 10 days post-application showed significantly better control efficacy than the individual single-agent controls.

[0126] In summary, through indoor toxicity testing and field efficacy trials, it can be seen that the insecticidal composition of the present invention has a good control effect on the rice planthopper, a hemiptera pest, and is safe for the target crop. It has significant control effect and is superior to single agents in delaying the development of resistance and prolonging the duration of action.

[0127] Although this application describes specific implementation methods in detail with the aid of embodiments, the disclosure of this application can be modified and replaced in various ways. However, it should be understood that the disclosure of this application is not limited to the specific forms disclosed. Rather, the disclosure of this application covers all modifications, equivalents, and replacements within the scope of the disclosure of this application, the scope of which is defined by the appended claims and their legal equivalents.

Claims

1. A pesticidal composition, characterized by, The pesticide composition comprises active ingredient A and active ingredient B, the active ingredient A is a compound of formula I, the structure of the compound of formula I is shown below: (Formula I), the active ingredient B is acetoprole, pyrafluprole or pyriprole; the mass ratio of the active ingredient A to the active ingredient B is 1:30-35:

1.

2. The pesticidal composition according to claim 1, characterized in that, The active ingredient B is acetoprole, and the mass ratio of the active ingredient A to the active ingredient B is 1:20-22:

1. The active ingredient B is pyrafluprole, and the mass ratio of the active ingredient A to the active ingredient B is 1:26-30:

1. The active ingredient B is pyriprole, and the mass ratio of the active ingredient A to the active ingredient B is 1:30-20:

1.

3. The pesticidal composition according to claim 2, characterized in that, The active ingredient B is acetoprole, and the mass ratio of the active ingredient A to the active ingredient B is 1:20-16:

1. The active ingredient B is pyrafluprole, and the mass ratio of the active ingredient A to the active ingredient B is 1:18-25:

1. The active ingredient B is pyriprole, and the mass ratio of the active ingredient A to the active ingredient B is 1:20-15:

1.

4. The pesticidal composition according to claim 1, characterized in that, The active ingredient in the pesticide composition accounts for 1%-70% of the total weight of the pesticide composition.

5. The pesticidal composition according to claim 1, characterized in that, The pesticide composition further comprises pesticide-allowable auxiliary ingredients in addition to the active ingredients, and the auxiliary ingredients are selected from one or more of wetting agents, dispersants, emulsifiers, thickening agents, disintegrants, antifreezes, antifoaming agents, solvents, preservatives, stabilizers, synergists or carriers.

6. The pesticidal composition according to claim 1, characterized in that, The pesticide composition is prepared into an agriculturally-allowable formulation form, which is a solid formulation or a liquid formulation.

7. The pesticidal composition according to claim 6, characterized in that, The solid formulation is water dispersible granules or wettable powder, and the liquid formulation is suspension concentrate, emulsifiable concentrate, microemulsion, dispersible oil suspension or water emulsion.

8. Use of the pesticide composition according to any one of claims 1-7 for controlling hemipteran pests.

9. Use according to claim 8, characterized in that, The hemipteran pests are rice planthoppers.

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