Insecticidal composition and application thereof

Abstract

The invention belongs to the technical field of pesticide disinfestation, and discloses an insecticidal composition and application thereof.The insecticidal composition comprises an active component A and an active component B. The active component A is dimpropyridaz, the active component B is any one of metaflumizone or flupyrimin, and the mass ratio of the active component A to the active component B is 1: 32-36: 1. According to the insecticidal composition disclosed by the invention, by compounding medicaments with different action mechanisms, the knockdown speed and the fatality rate of pests are improved, and the control effect is obviously improved; the pest physiological system is attacked through different target spots, the selection pressure of a single pesticide is reduced, the service life of the single pesticide can be prolonged, and formation of resistant populations is delayed.

Description

Technical Field

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

[0002] Dimpropyridaz is a pyrazole amide insecticide with a novel mechanism of action. Its mechanism of action is as a string organ modulator, acting on important notochordial organs (mechanical stress receptors) in insects. It inhibits string organ function by blocking signal transduction upstream of the transient vanillic acid receptor (TRPV) channel, interfering with the insect's hearing, balance, sense of direction, gravity perception, and locomotion. This causes poisoned insects to lose coordination, become unable to feed, and ultimately die. It can be used to control pests in the Lepidoptera, Coleoptera, Diptera, Hemiptera, Thysanoptera, and Isoptera orders.

[0003] Cyfluthrin, a triazone insecticide, is effective against important economic pests such as rice leaf roller, diamondback moth, beet armyworm, cabbage caterpillar, cotton bollworm, cotton red bollworm, flea beetles, and stink bugs. Its mechanism of action is unique, possessing both stomach poison and contact action. It blocks sodium ion channels in the insect's nervous system, causing excessive relaxation and paralysis, ultimately leading to death.

[0004] Flupyrimin, a neonicotinoid insecticide, is an antagonist, unlike most insecticides that act on nicotinic acetylcholine receptors. It is relatively safe for pollinating insects and can effectively control a variety of pests, including Hemiptera, Lepidoptera, Thysanoptera, and Diptera.

[0005] In my country, pest control methods mainly include chemical, biological, physical, and agricultural cultivation approaches, with chemical control remaining the most effective strategy. However, continuous use of pesticides over many years has led to a decline in their effectiveness, necessitating increased dosage and frequency. This not only increases production costs but also fosters varying degrees of pesticide resistance in pests. Therefore, it is crucial to select appropriate chemical pesticides to prevent increased pesticide resistance and residues. Furthermore, with rising living standards, domestic and international consumers are paying closer attention to the quality and safety of agricultural products. Highly toxic chemical reagents can cause varying degrees of damage to the ecological environment and directly or indirectly harm human health.

[0006] This study selected several chemical agents for rational compounding and conducted indoor bioactivity studies and field control trials on rice planthoppers and diamondback moths, aiming to provide a theoretical reference for the rational control of pests and the improvement of crop quality and yield. Summary of the Invention

[0007] Based on the above problems, the present invention provides an insecticidal composition and its application. This insecticidal composition rationally combines compounds with different mechanisms of action, which has a significant synergistic effect on agricultural pests, improving efficacy while reducing dosage.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: an insecticidal composition containing dimpropyridaz, wherein active ingredient A is dimpropyridaz, active ingredient B is either cyfluthrin or flupyrimin, and the mass ratio of active ingredient A to active ingredient B is 1:32 to 36:1, or any value within the above range.

[0009] Furthermore, the active ingredient B is cyanflufenican, and the mass ratio of active ingredient A to active ingredient B is 1:24 to 18:1, or any value within the above range;

[0010] The active ingredient B is flupyrimin, and the mass ratio of active ingredient A to active ingredient B is 1:25 to 30:1, or any value within the above range.

[0011] Furthermore, the active ingredient B is cyanflufenican, and the mass ratio of active ingredient A to active ingredient B is 1:18 to 5:1, or any value within the above range.

[0012] The active ingredient B is flupyrimin, and the mass ratio of active ingredient A to active ingredient B is 1:20 to 24:1, or any value within the above range.

[0013] Furthermore, the active ingredient B is cyanflufenican, and the mass ratio of active ingredient A to active ingredient B is 1:24, 1:18, 1:15, 1:8, 1:4, 2:1, 5:1, 12:1, or 18:1.

[0014] The active ingredient B is flupyrimin, and the mass ratio of active ingredient A to active ingredient B is 1:25, 1:20, 1:15, 1:10, 1:5, 6:1, 12:1, 18:1, 24:1, or 30:1.

[0015] Furthermore, based on a total mass of 100 wt% of the insecticidal composition, the sum of the contents of active ingredient A and active ingredient B in the insecticidal composition is 0.5% to 90%, or any value within the above range.

[0016] Furthermore, the sum of the contents of active ingredient A and active ingredient B in the insecticidal composition is 1% to 85%, or any value within the above range.

[0017] Furthermore, the insecticidal composition, in addition to the active ingredient, also includes agriculturally acceptable auxiliary ingredients selected from one or more of wetting agents, dispersants, emulsifiers, thickeners, disintegrants, antifreeze agents, defoamers, solvents, preservatives, stabilizers, synergists, or carriers.

[0018] Furthermore, the insecticidal composition is prepared into an agriculturally permissible formulation, wherein the formulation is selected from solid and / or liquid formulations.

[0019] Furthermore, the solid formulation is selected from wettable powders and water-dispersible granules; the liquid formulation is selected from emulsifiable concentrates, water emulsions, microemulsions, suspensions, suspension emulsions, and dispersible oil suspensions.

[0020] The present invention also discloses the application of the insecticidal composition described above in the control of agricultural and forestry pests.

[0021] Furthermore, the pests are lepidopteran pests or hemiptera pests, the lepidopteran pest being the diamondback moth and the hemiptera pest being the rice planthopper.

[0022] Furthermore, the insecticidal composition is applied in an effective dose to the pest that needs to be controlled or to the medium in which it grows.

[0023] The beneficial effects of this invention are as follows:

[0024] The insecticidal composition of the present invention can produce a synergistic effect by combining insecticides with different mechanisms of action, thereby increasing the knockdown speed and mortality rate of pests and significantly improving the control effect. By attacking the physiological system of pests at different targets, the selection pressure of single agents is reduced, which can extend the service life of single insecticides and delay the formation of resistant populations. Detailed Implementation

[0025] 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.

[0026] Formulation preparation method:

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 6. Microemulsion preparation method: According to the formula ratio, mix the active ingredients, solvent, emulsifier, etc. to obtain the oil phase. Mix the antifreeze and water evenly to obtain the aqueous phase. Add the oil phase to the aqueous phase under stirring and stir evenly. Continue shearing for 10 minutes. Then add the defoamer and stir evenly to obtain small droplets with oil phase particles of 0.01-0.1 micrometers, which is the microemulsion product.

[0033] Formulation preparation example:

[0034] Preparation Example 1: 20% dimpropyridaz·cyfluthrin suspension concentrate (1:4)

[0035] Formula composition: 4% dimpropyridaz, 16% cyanflufenican, 1% phenethylphenol polyoxyethylene polyoxypropylene ether, 5% arylphenol polyoxyethylene ether phosphate, 1% sodium lignosulfonate, 0.25% xanthan gum, 5% ethylene glycol, 0.1% benzisothiazolinone potassium, 0.5% silicone oil, deionized water to make up the balance.

[0036] Preparation Example 2: 18% dimpropyridaz·flupyrimin suspension (1:5)

[0037] Formula composition: 3% dimpropyridaz, 15% flupyrimin, 1% castor oil polyoxyethylene ether, 2% tristyrylphenol polyoxyethylene ether polyoxypropylene ether, 1% sodium alkyl polyoxyethylene ether sulfonate, 5% styrylphenol polyoxyethylene ether phosphate, 2% magnesium aluminum silicate, 0.15% carboxyethyl cellulose, 1% potassium benzoate, 5% glycerol, 0.5% silicone oil, deionized water to make up the balance.

[0038] Preparation Example 3: 9% dimpropyridaz·cyfluthrin EC (2:1)

[0039] Formulation composition: 6% dimpropyridaz, 3% cyanflufenican, 10% EO / PO block copolymer, 15% acetophenone, 8% propylene glycol methyl ether, 1% naphthalene sulfonate formaldehyde condensate, xylene to make up the balance.

[0040] Preparation Example 4: 14% dimpropyridaz·flupyrimin emulsifiable concentrate (6:1)

[0041] Formula composition: 12% dimpropyridaz, 2% flupyrimin, 20% N-methylpyrrolidone, 15% Gelbert alcohol polyoxyethylene ether, 2% sodium dodecyl sulfate, 10% DMF, balance methyl oleate.

[0042] Preparation Example 5: 18% dimpropyridaz·cyfluthrin dispersible oil suspension (1:8)

[0043] Formula composition: 2% dimpropyridaz, 16% cyanflufenican, 2% lignin sulfonate, 12% glycerol fatty acid ester polyoxyethylene ether, 2% alkylphenol polyoxyethylene ether, 4% sodium dodecyl sulfate, 1% silica, 1% organic bentonite, and soybean oil to make up the balance.

[0044] Preparation Example 6: 11% dimpropyridaz·flupyrimin dispersible oil suspension (1:10)

[0045] Formula composition: 1% dimpropyridaz, 10% flupyrimin, 2% fatty alcohol polyoxyethylene ether sulfate, 12% alkyl aryl polyoxyethylene polyoxypropylene ether, 5% ethylene glycol oxyethylene polyoxypropylene ether, 2% calcium dodecylbenzenesulfonate, 2% silica, 1% organobentonite, methyl oleate to make up the balance.

[0046] Preparation Example 7: 30% dimpropyridaz·cyfluthrin water-dispersible granules (5:1)

[0047] Formula composition: 25% dimpropyridaz, 5% cyanflufenican, 8% sodium alkyl polyoxyethylene ether sulfonate, 3% BX (a type of acetic acid powder), 5% succinate sulfonate, 5% white sugar, kaolin to make up the balance;

[0048] Preparation Example 8: 26% dimpropyridaz·flupyrimin water-dispersible granules (12:1)

[0049] Formula composition: 24% dimpropyridaz, 2% flupyrimin, 5% calcium dodecylbenzenesulfonate, 10% sodium dioctyl succinate sulfonate, 2% sodium dodecyl sulfate, 10% ammonium sulfate, starch to make up the balance;

[0050] Preparation Example 9: 32% dimpropyridaz·cyfluthrin wettable powder (1:15)

[0051] Formula composition: 2% dimpropyridaz, 30% cyanflufenican, 8% sodium lignosulfonate, 5% fatty alcohol polyoxyethylene ether sulfate, 2% stretching powder BX, 10% silica, kaolin to make up the balance;

[0052] Preparation Example 10: 24% dimpropyridaz·flupyrimin wettable powder (1:15)

[0053] Formula composition: 1.5% dimpropyridaz, 22.5% flupyrimin, 10% sodium lignosulfonate, 3% sodium dodecyl sulfate, 6% sodium alkyl polyoxyethylene ether sulfonate, 5% silica, 25% starch, kaolin to make up the balance;

[0054] Preparation Example 11: 5% dimpropyridaz·cyfluthrin microemulsion (1:1)

[0055] Formula composition: 2.5% dimpropyridaz, 2.5% cyanflufenican, 15% cyclohexanone, 10% castor oil polyoxyethylene ether, 5% isotridecyl alcohol polyoxyethylene ether, 2% naphthalene sulfonate formaldehyde condensate, 0.02% silicone defoamer, deionized water to make up the balance;

[0056] Preparation Example 12: 19% dimpropyridaz·flupyrimin microemulsion (18:1)

[0057] Formula composition: 18% dimpropyridaz, 1% flupyrimin, 10% xylene, 15% cyclohexanone, 13% phenethylphenol polyoxyethylene polyoxypropylene ether, 5% EO-PO block copolymer, 1% sodium alkyl polyoxyethylene ether sulfonate, 5% ethylene glycol, 0.1% silicone defoamer, deionized water to make up the balance.

[0058] Example 1: Indoor bioactivity assay of diamondback moth

[0059] Test basis: The test referenced NY / T-1154.14-2008 "Guidelines for Indoor Biological Testing of Pesticides - Insecticides - Part 14: Leaf Dipping Method".

[0060] Experimental target: Diamondback moth 3rd instar larvae.

[0061] Test agents: dimpropyridaz and cyfluthrin technical.

[0062] Experimental Methods: Based on the preliminary test results, the above-mentioned original drugs were dissolved in suitable solvents and then diluted with 0.1% Tween 80 aqueous solution to create appropriate concentration gradients. A treatment without any pesticides (containing all organic solvents and emulsifiers) was used as a blank control. Clean cabbage leaves that had not been treated with any pesticides were selected, and leaf discs were punched from the leaves using a 2cm diameter punch. The leaf discs were immersed in the prepared pesticide solution for 10 seconds, then removed and air-dried at room temperature. They were then placed in petri dishes lined with moisturizing filter paper, with 10 test insects inoculated into each dish. Each treatment was repeated four times.

[0063] Experimental investigation: After 48 hours of treatment, the number of dead larvae in each treatment was counted. The larvae were gently touched with a small brush or tweezers. Individuals that could not coordinate their movements or whose bodies differed too much from the control were considered dead.

[0064] Calculation method:

[0065] Calculate the mortality rate for each treatment based on the survey data. Use the following formula:

[0066]

[0067] In the formula:

[0068] P – Mortality rate, expressed as a percentage (%);

[0069] K represents the number of dead insects, in heads;

[0070] N represents the total number of insects treated, in units of heads.

[0071]

[0072] In the formula:

[0073] P1 – Corrected mortality rate, in percentage (%);

[0074] P t —The mortality rate is expressed as a percentage (%).

[0075] P0 – Mortality rate in the blank control group, expressed as a percentage (%).

[0076] 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.

[0077] The toxicity regression equation, correlation coefficient, and LC were obtained using a statistical analysis system. 50The value is used to evaluate the activity of the test reagent on the biological sample.

[0078] The co-toxicity coefficient (CTC value) of the mixture is calculated using the following formula:

[0079]

[0080] In the formula:

[0081] ATI – Actual Measured Toxicity Index of Mixtures;

[0082] S – LC50 of standard insecticides 50 The unit is milligrams per liter (mg / L);

[0083] M – LC of the mixture 50 The unit is milligrams per liter (mg / L).

[0084] TTI = TI A ×P A +TI B ×P B

[0085] In the formula:

[0086] TTI – Theoretical Toxicity Index of Mixtures;

[0087] TI A —A. Toxicity index of drug A;

[0088] P A —Percentage content of drug A in the mixture, expressed as percentage (%);

[0089] TI B —Toxicity index of drug B;

[0090] P B —Percentage content of agent B in the mixture, expressed as percentage (%).

[0091]

[0092] In the formula:

[0093] CTC – Cotoxicity Coefficient;

[0094] ATI – Actual Measured Toxicity Index of Mixtures;

[0095] TTI – Theoretical Toxicity Index of Mixtures.

[0096] The co-toxicity coefficient of the compound is ≥120, which shows a synergistic effect; CTC≤80 shows an antagonistic effect; and 80<CTC<120 shows an additive effect.

[0097] The results of the indoor tests are shown in the table below:

[0098] Table 1. Results of indoor bioactivity tests of dimpropyridaz and cyfluthrin in diamondback moth.

[0099]

[0100] The results of the indoor bioactivity assay (Table 1) show that the combination of dimpropyridaz and cyfluthrin exhibits good bioactivity in diamondback moth. When the mass ratio of dimpropyridaz to cyfluthrin is 1:24–18:1, the co-toxicity coefficient is greater than 120, indicating a synergistic effect. When the mass ratio is 1:18–5:1, the co-toxicity coefficient is greater than 130, indicating a significant synergistic effect. When the mass ratio is 1:15–2:1, the co-toxicity coefficient is greater than 150, indicating a significant synergistic effect. Among these, the mass ratio of dimpropyridaz to cyfluthrin is 1:8, resulting in the highest co-toxicity coefficient and a significant synergistic effect.

[0101] Specifically, when the mass ratio of dimpropyridaz to cyfluthrin was 1:24, 1:18, 1:15, 1:8, 1:4, 2:1, 5:1, 12:1, and 18:1, the co-toxicity coefficient was greater than 120, indicating a synergistic effect. When the mass ratio of dimpropyridaz to cyfluthrin was 1:18, 1:15, 1:8, 1:4, 2:1, and 5:1, the co-toxicity coefficient was greater than 130, indicating a significant synergistic effect. When the mass ratio of dimpropyridaz to cyfluthrin was 1:15, 1:8, 1:4, and 2:1, the co-toxicity coefficient was greater than 150, indicating a significant synergistic effect.

[0102] Example 2: Indoor bioactivity test against rice planthoppers

[0103] Experimental target: Brown planthopper (Nilaparvata lugens), 3rd instar nymph.

[0104] Test reagents: dimpropyridaz and flupyrimin technical grade; the test reagents were dissolved in a suitable solvent to prepare a stock solution of a certain concentration, and then the stock solution was diluted with 0.1% Tween-80 aqueous solution to make 5 series.

[0105] Experimental method: The pressure of the Potter spray tower was stabilized at 1.47 × 10⁻⁶. 5Pa, the spray nozzle was first cleaned twice with acetone, then twice with distilled water. Thirty test insects of uniform physiological condition were selected using a brush and placed in a culture dish. The dish was then placed on the bottom of the Potter spray tower for quantitative spraying, with a spray volume of 1 mL. After the solution settled for 1 minute, it was removed. Each treatment was repeated four times, with a 0.1% Tween-80 aqueous solution used as a blank control. The treated insects were then placed in an intelligent artificial climate chamber with a temperature of (25±1)℃, a relative humidity of 60%–80%, and a photoperiod of 16L:8D. Mortality was checked after 48 hours; insects that did not move at all when gently touched with a No. 0 brush were considered dead.

[0106] Calculation method:

[0107] Calculate the mortality rate for each treatment based on the survey data. Use the following formula:

[0108]

[0109] In the formula:

[0110] P – Mortality rate, expressed as a percentage (%);

[0111] K represents the number of dead insects, in heads;

[0112] N represents the total number of insects treated, in units of heads.

[0113]

[0114] In the formula:

[0115] P1 – Corrected mortality rate, in percentage (%);

[0116] P t —The mortality rate is expressed as a percentage (%).

[0117] P0 – Mortality rate in the blank control group, expressed as a percentage (%).

[0118] 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.

[0119] The toxicity regression equation, correlation coefficient, and LC were obtained using a statistical analysis system. 50 The value is used to evaluate the activity of the test reagent on the biological sample.

[0120] The co-toxicity coefficient (CTC value) of the mixture is calculated using the following formula:

[0121]

[0122] In the formula:

[0123] ATI – Actual Measured Toxicity Index of Mixtures;

[0124] S – LC50 of standard insecticides 50 The unit is milligrams per liter (mg / L);

[0125] M – LC of the mixture 50 The unit is milligrams per liter (mg / L).

[0126] TTI = TI A ×P A +TI B ×P B

[0127] In the formula:

[0128] TTI – Theoretical Toxicity Index of Mixtures;

[0129] TI A —A. Toxicity index of drug A;

[0130] P A —Percentage content of drug A in the mixture, expressed as percentage (%);

[0131] TI B —Toxicity index of drug B;

[0132] P B —Percentage content of agent B in the mixture, expressed as percentage (%).

[0133]

[0134] In the formula:

[0135] CTC – Cotoxicity Coefficient;

[0136] ATI – Actual Measured Toxicity Index of Mixtures;

[0137] TTI – Theoretical Toxicity Index of Mixtures.

[0138] The co-toxicity coefficient of the compound is ≥120, which shows a synergistic effect; CTC≤80 shows an antagonistic effect; and 80<CTC<120 shows an additive effect.

[0139] The results of the indoor tests are shown in the table below:

[0140] Table 2 Results of indoor bioactivity tests of dimpropyridaz and flupyrimin combination on planthoppers

[0141]

[0142]

[0143] Indoor experiments showed that the combination of dimpropyridaz and flupyrimin at appropriate mass ratios significantly enhanced the efficacy against the brown planthopper in rice. A mass ratio of dimpropyridaz to flupyrimin of 1:25–30:1 resulted in a co-toxicity coefficient greater than 120, indicating a synergistic effect; a mass ratio of 1:20–24:1 resulted in a co-toxicity coefficient greater than 130, indicating a significant synergistic effect; and a mass ratio of 1:15–18:1 resulted in a co-toxicity coefficient greater than 150, indicating a remarkable synergistic effect.

[0144] Specifically, when the mass ratio of dimpropyridaz to flupyrimin is 1:25, 1:20, 1:15, 1:10, 1:5, 6:1, 12:1, 18:1, 24:1, or 30:1, the co-toxicity coefficient against brown planthopper is greater than 120, indicating a synergistic effect. When the mass ratio of dimpropyridaz to flupyrimin is 1:20, 1:15, 1:10, 1:5, 6:1, 12:1, 18:1, or 24:1, the co-toxicity coefficient is greater than 130, indicating a significant synergistic effect. When the mass ratio of dimpropyridaz to flupyrimin is 1:15, 1:10, 1:5, 6:1, 12:1, or 18:1, the co-toxicity coefficient is greater than 150, indicating a significant synergistic effect.

[0145] Example 3: Field efficacy test for controlling diamondback moth

[0146] Experimental site: Yangjia Village, Shengcheng Street, Shouguang City, Weifang City, Shandong Province. The experimental site is neutral sandy loam soil with low organic matter content and convenient irrigation and drainage.

[0147] Experimental crop: Cabbage.

[0148] Experimental target: Diamondback moth.

[0149] Experimental Design: The experiment consisted of 6 treatments, each replicated 4 times, in a field plot using a randomized block design. Each plot was 30 m². 2 .

[0150] Application time: During the experiment, the cabbage was in the early stage of heading, which is the early stage of diamondback moth infestation. A 3WBS-16 sprayer was used to apply the pesticide, spraying until the front and back of the leaves were just wet and no longer dripping.

[0151] Investigation methods: Investigate the initial insect population before application of pesticides, and check the number of live insects 3 and 10 days after application. During the investigation, 5 points were randomly marked in each plot, and 2 plants were investigated at each point, for a total of 10 plants. The number of pests on the leaves of each cabbage plant was investigated, the number of live insects was recorded, and the insect population reduction rate and control effect were calculated.

[0152] The method for calculating drug efficacy is as follows:

[0153]

[0154] The results of the field efficacy trials are shown in the table below:

[0155] Table 3 Results of field efficacy trials for controlling diamondback moth.

[0156]

[0157]

[0158] Table 3 shows the field efficacy of the pesticide in controlling diamondback moth. A formulation prepared by rationally combining dimpropyridaz and cyfluthrin showed an effective concentration of 70 g / hm² of active ingredient. 2 At the given dosage, it showed high control efficacy against diamondback moth. Three days after application, the control efficacies of the three compound formulations were 86.99%, 89.28%, and 85.85%, respectively, indicating good rapid action; ten days after application, the control efficacies were 93.94%, 95.83%, and 90.32%, respectively, indicating a long duration of effectiveness.

[0159] Example 4: Field efficacy test for controlling rice planthoppers

[0160] Experimental location: The experiment was conducted in a paddy field in Huadong Village, Yangjiaqiao Town, Xiangtan County, Hunan Province. The soil organic matter content was at a moderate level, the soil fertility was at a moderate to high level, and the irrigation conditions were good. The experimental subject was the rice planthopper.

[0161] Experimental Design: The experiment included six treatments based on different pesticide applications, with an equal volume of water serving as a blank control. Each treatment was replicated four times, and each plot was 50 m². 2 Each plot was separated by a 1m isolation zone. During the experiment, no other pesticides were applied to any of the treatments, and all other cultivation management practices remained consistent.

[0162] Experimental method: The experiment was conducted on August 2, 2024. The Linong 16L HD-400 manual backpack sprayer was used for foliar spraying once. The field was kept at a shallow water level of 2-3cm for 7 days.

[0163] Experimental survey: The initial insect population was investigated before pesticide application, and the number of live insects was investigated 3 and 14 days after pesticide application. The survey adopted a parallel skip sampling method, with 15 points and 2 holes per point in each plot. During the survey, an enamel plate was placed under the rice plant and the planthoppers were tapped 3 times to make them fall into the enamel plate. The number of live insects was then counted.

[0164] Methods for calculating drug efficacy:

[0165]

[0166] The field efficacy results of the pesticide are shown below:

[0167] Table 4 Results of field efficacy trials for controlling rice planthoppers

[0168]

[0169]

[0170] Throughout the experiment, the growth, plant height, number of leaves, and leaf color of each pesticide-treated area were monitored periodically, and no differences were found between the treatment area and the control area. No obvious phytotoxicity was observed, indicating that the pesticide was safe for rice. The experimental results show that the rational combination of dimpropyridaz and flupyrimin has a good control effect on rice planthoppers, with outstanding rapid and sustained effects.

[0171] 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 diamondback moth and rice planthopper, and is safe for the target crops. It has significant control effect and is superior to single agents in delaying the development of resistance and prolonging the duration of action.

[0172] Although this application describes specific embodiments in detail with the aid of examples, the disclosure of this application can be modified and substituted in various ways. However, it should be understood that the disclosure of this application is not limited to the specific form disclosed. Rather, the disclosure of this application covers all modifications, equivalents, and substitutions 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. An insecticidal composition containing dimpropyridaz, characterized in that, The active ingredient A is dimpropyridaz, and the active ingredient B is either cyanflupyrimin or flupyrimin. The mass ratio of active ingredient A to active ingredient B is 1:32 to 36:

1.

2. The insecticidal composition according to claim 1, characterized in that, The active ingredient B is cyanfluthrin, and the mass ratio of active ingredient A to active ingredient B is 1:24 to 18:

1. The active ingredient B is flupyrimin, and the mass ratio of active ingredient A to active ingredient B is 1:25 to 30:1; Preferably, the active ingredient B is cyanflufenican, and the mass ratio of active ingredient A to active ingredient B is 1:18 to 5:

1. The active ingredient B is flupyrimin, and the mass ratio of active ingredient A to active ingredient B is 1:20 to 24:

1.

3. The insecticidal composition according to claim 1, characterized in that, The active ingredient B is cyanflufenican, and the mass ratio of active ingredient A to active ingredient B is 1:24, 1:18, 1:15, 1:8, 1:4, 2:1, 5:1, 12:1, or 18:

1. The active ingredient B is flupyrimin, and the mass ratio of active ingredient A to active ingredient B is 1:25, 1:20, 1:15, 1:10, 1:5, 6:1, 12:1, 18:1, 24:1, or 30:

1.

4. The insecticidal composition according to claim 1, characterized in that, Based on a total mass of 100 wt% of the insecticidal composition, the sum of the contents of active ingredient A and active ingredient B in the insecticidal composition is 0.5% to 90%. Preferably, the sum of the contents of active ingredient A and active ingredient B in the insecticidal composition is 1% to 85%.

5. The insecticidal composition according to claim 1, characterized in that, In addition to the active ingredient, the insecticidal composition also includes agriculturally acceptable auxiliary ingredients selected from one or more of wetting agents, dispersants, emulsifiers, thickeners, disintegrants, antifreeze agents, defoamers, solvents, preservatives, stabilizers, synergists, or carriers.

6. The insecticidal composition according to claim 5, characterized in that, The insecticidal composition is prepared into an agriculturally permissible formulation, wherein the formulation is selected from solid and / or liquid formulations.

7. The insecticidal composition according to claim 6, characterized in that, The solid formulation is selected from wettable powders and water-dispersible granules; the liquid formulation is selected from emulsifiable concentrates, water emulsions, microemulsions, suspensions, suspension emulsions, and dispersible oil suspensions.

8. The use of the insecticidal composition according to any one of claims 1-7 in the control of agricultural and forestry pests.

9. The application according to claim 8, characterized in that, The pests mentioned are lepidopteran pests or hemiptera pests. The lepidopteran pest is the diamondback moth, and the hemiptera pest is the rice planthopper.

10. The application according to claim 8, characterized in that, The insecticidal composition is applied in an effective dose to the pest that needs to be controlled or to the medium in which it grows.

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