An insecticide composition containing mesoionic compounds and its application

Abstract

The present invention relates to the technical field of pesticide insecticides, and discloses an insecticidal composition containing a mesoionic compound and its use. The active ingredients of the insecticidal composition include active ingredient A and active ingredient B, wherein active ingredient A is cybenzoxasulfyl, and active ingredient B is a mesoionic compound, wherein the mesoionic compound is either dicloromezotiaz or fenmezoditiaz. The mass ratio of active ingredient A to active ingredient B is 1:40 to 40:1. The insecticidal composition of the present invention can control a variety of plant pests, is safe to target organisms, has good fast-acting properties, and has a long-lasting effect.

Description

Technical Field

[0001] The invention belongs to the technical field of pesticide killing, and discloses an insecticidal composition containing a mesoionic compound and application thereof. Background Art

[0002] Fenmezoditiaz is a mesoionic insecticide developed by BASF. Its chemical name is (3R)-3-(2-chloro-1,3-thiazol-5-yl)-8-methyl-7-oxyylidene-6-phenyl-2,3,7,8-tetrahydro[1,3]thiazolo[3,2-a]pyrimidin-8-cation-5-oxyanion, and its CAS registration number is 2413390-32-4. This compound has a broad insecticide spectrum and is effective against a variety of plant pests. Its chemical structure is as follows:

[0003]

[0004] Dicliromezotiaz is a new mesoionic pyrimidinone insecticide developed by DuPont in the United States. Its chemical name is 1-[(2-chloro-5-thiazolyl)methyl]-3-(3,5-dichlorophenyl)-2-hydroxy-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidinium inner salt; CAS registration number is 1263629-39-5. Dicliromezotiaz acts on nicotinic acetylcholine receptors to exert insecticidal activity by blocking neurotransmission in target pests. Its chemical structure is as follows:

[0005]

[0006] Since the birth of insecticides, there has always been a toxicity problem. The long-term and large-scale use of many old-brand insecticides has led to increasingly prominent toxic accumulation and ecological environmental problems in non-target organisms, especially the significant increase in the resistance of some important pests to commonly used insecticides. Therefore, the market is in urgent need of supplementing green and safe insecticides to meet the growing demand for actual agricultural production and to cope with increasingly severe resistance challenges. In order to seek safe and efficient insecticides, the inventors have studied the compounding of cybenzoxasulfyl and dicloromezotiaz or fenmezoditiaz to produce a good synergistic effect on a variety of target pests, and there are no reports on the reasonable compounding of cybenzoxasulfyl and dicloromezotiaz or fenmezoditiaz. Summary of the Invention

[0007] Based on the above situation, the present invention provides an insecticidal composition containing mesoionic compounds, which has a significant synergistic effect on multiple target pests, especially excellent control effect against beet armyworm and aphids. Its purpose is to solve the current serious problem of insecticide resistance, reduce environmental pollution and reduce agricultural production costs.

[0008] To achieve the above object, the technical solution of the present invention is as follows: an insecticide composition containing a mesoionic compound, wherein the active ingredients of the insecticide composition include active ingredient A and active ingredient B, wherein the active ingredient A is cybenzoxasulfyl, and the active ingredient B is a mesoionic compound, wherein the mesoionic compound is either dicloromezotiaz or fenmezoditiaz, and the mass ratio of the active ingredient A to the active ingredient B is 1:40 to 40:1;

[0009] Furthermore, the active ingredient B is dicloromezotiaz, and the mass ratio of the active ingredient A to the active ingredient B is 1:24 to 30:1;

[0010] The active ingredient B is fenmezoditiaz, and the mass ratio of the active ingredient A to the active ingredient B is 1:40 to 35:1.

[0011] Furthermore, the active ingredient B is dicloromezotiaz, and the mass ratio of the active ingredient A to the active ingredient B is 1:22 to 25:1;

[0012] The active ingredient B is fenmezoditiaz, and the mass ratio of the active ingredient A to the active ingredient B is 1:40 to 30:1.

[0013] Furthermore, the active ingredient B is dicloromezotiaz, and the mass ratio of the active ingredient A to the active ingredient B is 1:16 to 20:1;

[0014] The active ingredient B is fenmezoditiaz, and the mass ratio of the active ingredient A to the active ingredient B is 1:24 to 35:1.

[0015] Furthermore, based on 100 wt% of the total weight of the insecticide composition, the sum of the content of the active ingredient A and the active ingredient B in the insecticide composition is 1 to 80 wt%.

[0016] Furthermore, the insecticide composition includes adjuvants in addition to the active ingredients, and the adjuvants are selected from one or more of wetting agents, dispersants, emulsifiers, thickeners, disintegrants, antifreeze agents, defoaming agents, solvents, preservatives, stabilizers, synergists or carriers.

[0017] Furthermore, the insecticide composition can be prepared into any agriculturally acceptable dosage form, which is a solid preparation or a liquid preparation;

[0018] Furthermore, the dosage form is that the liquid preparation is a suspension and / or an aqueous emulsion, and the solid preparation is a wettable powder.

[0019] The invention also discloses the use of the insecticide composition in preventing and controlling plant pests.

[0020] Furthermore, the plant pests are Lepidoptera and / or Hemiptera pests.

[0021] Furthermore, the lepidopteran pests are beet armyworm, diamondback moth, cabbage looper or rice stem borer, and the hemiptera pests are aphids, whiteflies, Bemisia tabaci or brown planthopper;

[0022] Furthermore, the lepidopteran pests are beet armyworms; the hemiptera pests are aphids

[0023] Compared with the prior art, the beneficial effects of the technical solution of the present invention are as follows:

[0024] (1) The insecticidal composition obtained by rationally compounding cybenzoxasulfyl and dicloromezotiaz or fenmezoditiaz has a significant synergistic effect and can effectively control a variety of plant pests;

[0025] (2) The insecticide composition of the present invention is friendly to crops, non-target organisms, and the environment, while reducing the amount of pesticides used and lowering the cost of use;

[0026] (3) The insecticide composition of the present invention has good quick-acting property and long lasting effect, and can effectively delay the development of insecticide resistance. DETAILED DESCRIPTION

[0027] In order to make the technical solutions, objectives and advantages of the present invention more clearly understood, the present invention is described in conjunction with the following specific embodiments. However, the present invention can be implemented in various forms and should not be limited to the embodiments described herein.

[0028] Preparation example:

[0029] Preparation Example 1: 22% cybenzoxasulfyl·fenmezoditiaz suspension (3:2)

[0030] Formula composition: 13.2% cybenzoxasulfyl, 8.8% fenmezoditiaz, 8% phenylethylphenol polyoxyethylene polyoxypropylene ether, 4% tristyrylphenol ethoxylate phosphate, 1% sodium lignin sulfonate, 0.25% xanthan gum, 5% glycerol, 0.1% potassium benzoate, 0.5% silicone oil, and deionized water to make up the balance;

[0031] Preparation method: According to the formula ratio, the active ingredients, surfactants and other functional additives are placed in a reactor in sequence, water is added and mixed evenly, and the suspension product is obtained by high-speed shearing, wet sand grinding, and finally homogenization filtration.

[0032] Preparation Example 2: 32% cybenzoxasulfyl·fenmezoditiaz wettable powder (3:1)

[0033] Formula composition: 24% cybenzoxasulfyl, 8% fenmezoditiaz, 4% sodium lignin sulfonate, 6% sodium alkyl polyoxyethylene ether sulfonate, 3% BX powder, 5% white carbon black, and kaolin makes up the balance;

[0034] Preparation method: The active ingredients, dispersant, wetting agent and filler are mixed according to the formula ratio, uniformly stirred in a stirring kettle, and pulverized and mixed uniformly for multiple times in a jet mill to prepare the wettable powder of the composition of the present invention.

[0035] Preparation Example 3: 25% cybenzoxasulfyl·dicloromezotiaz water dispersible granules (1:1)

[0036] Formula composition: 12.5% ​​cybenzoxasulfyl, 12.5% ​​dicloromezotiaz, 8% succinate sulfonate, 3% flaking powder BX, 6% sodium polycarboxylate, 8% white sugar, kaolin makes up the balance;

[0037] Preparation method: According to the formula ratio, the active ingredient is added to the carrier, and surfactants and other functional additives are added thereto, mixed, and after air flow grinding, 10-25% water is added, and then kneading, granulation, drying, and screening are carried out to obtain a water-dispersible granule product; or the crushed powder is sprayed with water in a boiling granulator, granulated, dried, and then sieved to obtain the product.

[0038] Preparation Example 4: 18% cybenzoxasulfyl·fenmezoditiaz suspension (1:1)

[0039] Formula composition: 9% cybenzoxasulfyl, 9% fenmezoditiaz, 3% ethylene glycol oxyethylene polyoxypropylene ether, 2% glycerol fatty acid ester polyoxyethylene ether, 4% fatty alcohol polyoxyethylene ether phosphate, 1% polycarboxylic acid sodium salt, 1.5% magnesium aluminum silicate, 0.15% carboxyethyl cellulose, 0.5% isothiazolinone, 5% glycerol, 0.5% silicone oil, and deionized water to make up the balance;

[0040] Preparation method: Same as Preparation Example 1.

[0041] Preparation Example 5: 30% cybenzoxasulfyl·fenmezoditiaz wettable powder (1:5)

[0042] Formula composition: 5% cybenzoxasulfyl, 25% fenmezoditiaz, 10% sodium lignin sulfonate, 2% sodium lauryl sulfate, 2% sodium polycarboxylate, 5% white carbon black, 30% starch, and kaolin makes up the balance;

[0043] Preparation method: same as Preparation Example 2.

[0044] Preparation Example 6: 20% cybenzoxasulfyl·fenmezoditiaz water dispersible granules (9:1)

[0045] Formula composition: 18% cybenzoxasulfyl, 2% fenmezoditiaz, 8% naphthalenesulfonate formaldehyde condensate, 6% sodium ligninsulfonate, 2% sodium lauryl sulfate, 15% ammonium sulfate, starch makes up the balance;

[0046] Preparation method: Same as Preparation Example 3.

[0047] Preparation Example 7: 21% cybenzoxasulfyl·dicloromezotiaz suspension (6:1)

[0048] Formula composition: 18% cybenzoxasulfyl, 3% dicloromezotiaz, 4% phenylethylphenol polyoxyethylene polyoxypropylene ether, 1% sodium salt of polycarboxylate, 3% styrylphenol polyoxyethylene ether phosphate, 4% sorbitan oleate polyoxyethylene ether, 0.5% magnesium aluminum silicate, 0.25% xanthan gum, 4% ethylene glycol, 0.1% sodium benzoate, 0.5% silicone oil, and deionized water to make up the balance;

[0049] Preparation method: Same as Preparation Example 1.

[0050] Preparation Example 8: 39% cybenzoxasulfyl·dicloromezotiaz wettable powder (1:12)

[0051] Formula composition: 3% cybenzoxasulfyl, 36% dicloromezotiaz, 8% lignin sulfonate, 4% naphthalene sulfonate formaldehyde condensate, 2% sodium lauryl sulfate, 25% starch, kaolin makes up the balance;

[0052] Preparation method: same as Preparation Example 2.

[0053] Preparation Example 9: 36% cybenzoxasulfyl·dicloromezotiaz water dispersible granules (1:8)

[0054] Formula composition: 4% cybenzoxasulfyl, 32% dicloromezotiaz, 10% sodium lignin sulfonate, 5% sodium alkyl polyoxyethylene ether sulfonate, 2% sodium lauryl sulfate, 10% white carbon black, 20% starch, and kaolin makes up the balance;

[0055] Preparation method: Same as Preparation Example 3.

[0056] Indoor toxicity test

[0057] Example 1: Indoor beet armyworm bioactivity assay

[0058] Test basis: The test refers to NY / T 1154.6-2006 "Guidelines for Indoor Biological Tests of Pesticides - Insecticides Part 6: Insecticide Activity Test Immersion Method".

[0059] Test target: beet armyworm (third instar larvae).

[0060] Instruments and equipment: electronic balance, insect immersion cage, volumetric flask, culture dish, beaker, pipette, tweezers, filter paper, marker pen, stopwatch.

[0061] Test agents: cybenzoxasulfyl, fenmezoditiaz, and dicloromezotiaz technical drugs;

[0062] Preparation: Dissolve the test drug in a suitable solvent and then dilute with 0.1% Tween 80 aqueous solution. Five concentration series are set according to the activity of the drug using the proportional method.

[0063] Chemical treatment: Immerse the test insects in the chemical solution for 5 seconds, then remove excess solution with filter paper and transfer the insects to normal rearing conditions. Each treatment was repeated four times, with 20 insects immersed in each repetition. A control treatment containing the corresponding organic solvent without the chemical was also included.

[0064] Investigation: Investigate the death of test insects 24 hours after treatment, and record the total number of insects and the number of dead insects.

[0065] Calculation method:

[0066] Based on the survey data, calculate the mortality rate of each treatment. Calculate as follows:

[0067]

[0068] Where:

[0069] P——mortality rate, in percentage (%);

[0070] K——indicates the number of dead insects, the unit is head;

[0071] N——represents the total number of insects processed, in heads.

[0072]

[0073] Where:

[0074] P1——adjusted mortality rate, in percentage (%);

[0075] P t ——Treatment mortality rate, expressed in percentage (%);

[0076] P0 - blank control mortality rate, in percentage (%).

[0077] If the control mortality rate is less than 5%, no correction is required; if the control mortality rate is between 5% and 20%, correction should be made according to the correction mortality formula; if the control mortality rate is greater than 20%, the test needs to be repeated.

[0078] The DPS statistical analysis system was used to analyze the toxicity regression equation, correlation coefficient and LC 50 The activity of the test agent on the biological test material is evaluated by the value.

[0079] The co-toxicity coefficient (CTC value) of the mixture is calculated as follows:

[0080]

[0081] Where:

[0082] ATI - measured toxicity index of mixture;

[0083] S——LC of standard pesticide 50 , the unit is milligrams per liter (mg / L);

[0084] M——LC of the mixture 50 , the unit is milligrams per liter (mg / L).

[0085] TTI=TI A ×P A +TI B ×PB

[0086] Where:

[0087] TTI – Theoretical Toxicity Index of Mixtures;

[0088] TI A ——Agent toxicity index;

[0089] P A ——The percentage of agent A in the mixture, in percentage (%);

[0090] TI B ——Toxicity index of agent B;

[0091] P B ——The percentage of agent B in the mixture, in percentage (%).

[0092]

[0093] Where:

[0094] CTC – Co-toxicity coefficient;

[0095] ATI - measured toxicity index of mixture;

[0096] TTI - Theoretical Toxicity Index of Mixture.

[0097] A co-toxicity coefficient (CTC) of 120 or higher indicates a synergistic effect; a co-toxicity coefficient (CTC) of 80 or lower indicates an antagonistic effect; and a co-toxicity coefficient (CTC) of 80 or lower indicates an additive effect.

[0098] The indoor test results are shown in the table below:

[0099] Table 1 Results of indoor biological activity test of cybenzoxasulfyl and fenmezoditiaz against Spodoptera exigua

[0100]

[0101] Laboratory test results (Table 1) show that combining cybenzoxasulfyl and fenmezoditiaz within an appropriate mass ratio range exhibits excellent control efficacy against Spodoptera exigua. When the mass ratio of cybenzoxasulfyl to fenmezoditiaz ranged from 1:40 to 30:1, the cotoxicity coefficient against Spodoptera exigua was greater than 120, demonstrating a synergistic effect. When the mass ratio of cybenzoxasulfyl to fenmezoditiaz ranged from 1:30 to 15:1, the cotoxicity coefficient exceeded 130, indicating a significant synergistic effect. When the mass ratio of cybenzoxasulfyl to fenmezoditiaz ranged from 1:20 to 8:1, the cotoxicity coefficient exceeded 150, demonstrating a significant synergistic effect.

[0102] Table 2 Results of indoor biological activity test of cybenzoxasulfyl and dicloromezotiaz against Spodoptera exigua

[0103]

[0104] The laboratory test results (Table 2) show that the combination of cybenzoxasulfyl and dicloromezotiaz within an appropriate mass ratio range exhibits excellent control efficacy against Spodoptera exigua. The mass ratio of cybenzoxasulfyl to dicloromezotiaz was 1:22 to 25:1, resulting in a co-toxicity coefficient greater than 120 against Spodoptera exigua, indicating a synergistic effect. The mass ratio of cybenzoxasulfyl to dicloromezotiaz was 1:8 to 10:1, resulting in a co-toxicity coefficient greater than 130, indicating a significant synergistic effect. The mass ratio of cybenzoxasulfyl to dicloromezotiaz was 1:4 to 5:1, resulting in a co-toxicity coefficient greater than 150, indicating a significant synergistic effect.

[0105] Example 2: Indoor green peach aphid bioactivity assay

[0106] Test method: leaf immersion method.

[0107] Test target: Green peach aphid (Myzus persicae).

[0108] Test agents: cybenzoxasulfyl, fenmezoditiaz, and dicloromezotiaz technical drugs;

[0109] Preparation of pharmaceuticals: Prepare the mother liquor of single doses separately, and design a reasonable ratio according to the mixing purpose and the activity of the pharmaceuticals. Each single dose and each group of mixed doses shall be prepared into the required series of mass concentrations according to the equal ratio method.

[0110] Method: Intact cabbage leaves of similar size, color, and other characteristics were selected, washed, and dried, then formed into leaf discs. These discs were immersed in various concentrations of the drug solution for 5 seconds, removed, dried, and then placed in Petri dishes lined with moisturizing filter paper. Twenty wingless adult aphids of similar size and vigor were selected and attached to the discs treated with each drug solution. Each treatment and control were replicated four times. After treatment, the Petri dishes were placed in an artificial climate chamber at a temperature of (23±1)°C, a relative humidity of (60±10)%, and a light intensity ratio of 16h:8h. Microscopic examination was performed after 48 hours.

[0111] Test investigation: Use a brush to gently touch the insect body. If there is no spontaneous reaction, it is considered dead. The number of dead insects is recorded.

[0112] Data statistics and analysis:

[0113] Based on the survey data, calculate the adjusted mortality rate of each treatment using formulas (1) and (2), with the results rounded to two decimal places:

[0114]

[0115] Where:

[0116] P——mortality rate, in percentage (%);

[0117] K——number of dead insects, in heads;

[0118] N——Total number of insects processed, in heads.

[0119]

[0120] Where:

[0121] P1——adjusted mortality rate, in percentage (%);

[0122] P t ——Treatment mortality rate, expressed in percentage (%);

[0123] P0 - blank control mortality rate, in percentage (%).

[0124] If the control mortality rate is less than 5%, no correction is required; if the control mortality rate is between 5% and 20%, correction should be made according to formula (2); if the control mortality rate is greater than 20%, the test needs to be repeated.

[0125] Use DPS statistical analysis system to analyze and find the toxicity regression line and LC 50 The co-toxicity coefficient (CTC value) of the mixture is calculated according to formula (3), formula (4), and formula (5):

[0126]

[0127] Where:

[0128] ATI - measured toxicity index of mixture;

[0129] S——LC of standard pesticide 50 , the unit is milligrams per liter (mg / L);

[0130] M——LC of the mixture 50 , the unit is milligrams per liter (mg / L).

[0131] TTI=TI A ×P A +TI B ×P B ···········(4)

[0132] Where:

[0133] TTI – Theoretical Toxicity Index of Mixtures;

[0134] TI A ——Agent toxicity index;

[0135] P A ——The percentage of agent A in the mixture, in percentage (%);

[0136] TI B ——Toxicity index of agent B;

[0137] P B ——The percentage of agent B in the mixture, in percentage (%).

[0138]

[0139] Where:

[0140] CTC – Co-toxicity coefficient;

[0141] ATI - measured toxicity index of mixture;

[0142] TTI - Theoretical Toxicity Index of Mixture.

[0143] A co-toxicity coefficient (CTC) of 120 or higher indicates a synergistic effect; a co-toxicity coefficient (CTC) of 80 or lower indicates an antagonistic effect; and a co-toxicity coefficient (CTC) of 80 or lower indicates an additive effect.

[0144] Table 3 Results of indoor bioactivity test on aphids by combining cybenzoxasulfyl and fenmezoditiaz

[0145]

[0146]

[0147] The results of the laboratory tests (Table 3) show that combining cybenzoxasulfyl and fenmezoditiaz within an appropriate mass ratio range exhibits excellent control effects against aphids. When the mass ratio of cybenzoxasulfyl to fenmezoditiaz ranged from 1:24 to 35:1, the co-toxicity coefficient against aphids exceeded 120, indicating a synergistic effect. When the mass ratio of cybenzoxasulfyl to fenmezoditiaz ranged from 1:18 to 24:1, the co-toxicity coefficient exceeded 130, indicating a significant synergistic effect. When the mass ratio of cybenzoxasulfyl to fenmezoditiaz ranged from 1:9 to 18:1, the co-toxicity coefficient exceeded 150, indicating a significant synergistic effect.

[0148] Table 4 Results of indoor bioactivity test on aphids by combining cybenzoxasulfyl and dicloromezotiaz

[0149]

[0150] The laboratory test results (Table 4) show that combining cybenzoxasulfyl and dicloromezotiaz within an appropriate mass ratio range exhibits excellent control effects against aphids. When the mass ratio of cybenzoxasulfyl to dicloromezotiaz ranged from 1:24 to 30:1, the co-toxicity coefficient against aphids was greater than 120, indicating a synergistic effect. When the mass ratio of cybenzoxasulfyl to dicloromezotiaz ranged from 1:12 to 25:1, the co-toxicity coefficient was greater than 130, indicating a significant synergistic effect. When the mass ratio of cybenzoxasulfyl to dicloromezotiaz ranged from 1:3 to 15:1, the co-toxicity coefficient was greater than 150, indicating a significant synergistic effect.

[0151] Example 3: Field efficacy test for controlling beet armyworm

[0152] Test crops: green onions;

[0153] Test subjects: beet armyworm;

[0154] The trial was conducted in a scallion field in Shuimengzhuang Village, Shuitun Town, Yicheng District, Zhumadian City, Henan Province. The soil fertility was above average, and cultivation conditions were uniform across all plots, consistent with local agricultural practices (GAP).

[0155] Experimental method: The experimental plots were arranged in random blocks, with protection rows set between adjacent plots. The plot area was 20m 2The test was repeated 4 times, and the pesticide was applied on September 3, 2023, when the beet armyworm was in the 1st to 3rd instar larvae. Conventional spraying was used once, and the application equipment was a Huyue brand 3WBD-20 electric sprayer.

[0156] Survey Method: The survey used a five-point sampling method, with 5 random points selected from each plot and 10 plants sampled at each point. Before application, a population base survey was conducted on the occurrence of Spodoptera exigua. Seven and 15 days after application, live insects were counted, and the population reduction rate and control efficacy were calculated.

[0157] Calculation method of drug efficacy:

[0158]

[0159] The test results are shown in the table below:

[0160] Table 5 Field efficacy test on control of beet armyworm

[0161]

[0162] The results of the field efficacy test showed (see Table 5) that each test agent had a certain control effect on beet armyworm; 7 days after the application, the treatments were: Preparation Example 1: 22% cybenzoxasulfyl·fenmezoditiaz suspension concentrate (3:2), Preparation Example 3: 25% cybenzoxasulfyl·dicloromezotiaz water dispersible granules (1:1), Preparation Example 7: 21% cybenzoxasulfyl·dicloromezotiaz suspension concentrate (6:1), Preparation Example 2: 32%

[0163] The cybenzoxasulfyl·fenmezoditiaz wettable powder (3:1) had the best effect, with control effects of 93.10%, 94.49%, 89.75% and 90.57% respectively; the 18% fenmezoditiaz emulsion in water, 25% dicloromezotiaz suspension concentrate and 12% cybenzoxasulfyl emulsifiable concentrate had lower control effects, which were 80.31%, 77.29% and 79.40% respectively; 15 days after application, the 22% cybenzoxasulfyl·fenmezoditiaz suspension concentrate (3:2) of Preparation Example 1 had the best control effect, with a control efficiency of 97.12%.

[0164] Example 4: Field test on efficacy of aphid control

[0165] Test basis: The test refers to NY / T 1464.27-2010 "Guidelines for Field Efficacy Tests of Pesticides Part 27: Insecticides for Control of Aphids on Cruciferous Vegetables".

[0166] Test crops: cabbage;

[0167] Test target: aphids;

[0168] The trial was conducted in Donghuang Village, Dongxia Town, Qingzhou City, Weifang City. The soil fertility was moderate and irrigation conditions were good. Cultivation conditions were uniform across all plots and consistent with local agricultural practices (GAP).

[0169] Experimental method: The experimental plots were arranged in random blocks, with protection rows set between adjacent plots. The plot area was 20m 2 , with 4 repetitions each. The trial was conducted in August 2023, using conventional spraying methods.

[0170] Survey Methods: Baseline population counts were conducted before treatment, and residual counts were conducted 3 and 7 days after treatment, for a total of 3 surveys. Five random sampling points were selected from each plot, with 5 plants surveyed at each point. Aphids were marked on one leaf per plant, and the number of live aphids was recorded.

[0171] Calculation method of drug efficacy:

[0172]

[0173] The test results are shown in the table below:

[0174]

[0175] Analysis of the test results: During the test, the cabbage in each treatment plot grew well, and no pesticide damage was observed in any of the treatments. As can be seen from the table, 3 days after spraying 18% cybenzoxasulfyl·fenmezoditiaz suspension (1:1) and 36% cybenzoxasulfyl·dicloromezotiaz water dispersible granules (1:8), the number of aphids decreased, with the insect population reduction rates being 88.05% and 84.35%, respectively, and the control efficacy being 89.50% and 86.25%, respectively. The control efficacy of the control agents 18% fenmezoditiaz water emulsion, 25% dicloromezotiaz suspension, and 12% cybenzoxasulfyl emulsifiable concentrate were 69.75%, 74.11%, and 66.71%, respectively. 7 days after the spraying, the number of aphids decreased, with the number of aphids decreasing by 88.05% and 84.35%, respectively, and the control efficacy being 89.50% and 86.25%, respectively.

[0176] The corrected efficacy of cybenzoxasulfyl·dicloromezotiaz water dispersible granules (1:8) were 96.31% and 93.75%, respectively, which were significantly improved compared with the previous period (3 days after application).

[0177] Although the present application describes specific embodiments in detail by way of example, the disclosure of the present application may adopt various modifications and alternative forms. However, it should be understood that the disclosure of the present application is not limited to the specific forms disclosed. On the contrary, the disclosure of the present application covers all modifications, equivalents and alternative forms within the scope of the disclosure of the present application, and the scope of the present application is limited by the appended claims and their legal equivalents.

Claims

1. An insecticidal composition containing an interionic compound, characterized in that: The active ingredients of the insecticide composition include active ingredient A and active ingredient B, wherein the active ingredient A is cybenzoxasulfyl, and the active ingredient B is a mesoionic compound, wherein the mesoionic compound is either dicloromezotiaz or fenmezoditiaz; The active ingredient B is dicloromezotiaz, and the mass ratio of the active ingredient A to the active ingredient B is 1:24-30:1; The active ingredient B is fenmezoditiaz, and the mass ratio of the active ingredient A to the active ingredient B is 1:40 to 35:

1.

2. The insecticidal composition according to claim 1, characterized in that The active ingredient B is dicloromezotiaz, and the mass ratio of the active ingredient A to the active ingredient B is 1:22-25:1; The active ingredient B is fenmezoditiaz, and the mass ratio of the active ingredient A to the active ingredient B is 1:40 to 30:

1.

3. The insecticidal composition according to claim 1, characterized in that The active ingredient B is dicloromezotiaz, and the mass ratio of the active ingredient A to the active ingredient B is 1:16 to 20:1; The active ingredient B is fenmezoditiaz, and the mass ratio of the active ingredient A to the active ingredient B is 1:24-35:

1.

4. The insecticidal composition according to claim 1, characterized in that Based on 100 wt% of the total weight of the insecticide composition, the sum of the content of the active ingredient A and the active ingredient B in the insecticide composition is 1 to 80 wt%.

5. The insecticidal composition according to claim 1, characterized in that In addition to the active ingredients, the insecticide composition further comprises an adjuvant, which is selected from one or more of a wetting agent, a dispersant, an emulsifier, a thickener, a disintegrant, an antifreeze agent, a defoaming agent, a solvent, a preservative, a stabilizer, a synergist or a carrier.

6. The insecticidal composition according to claim 1, characterized in that The insecticide composition can be prepared into any agriculturally acceptable dosage form, which is a solid preparation or a liquid preparation.

7. The insecticidal composition according to claim 6, characterized in that The liquid preparation is a suspension and / or an aqueous emulsion, and the solid preparation is a wettable powder.

8. Use of the insecticidal composition according to any one of claims 1 to 7 in controlling plant pests.

9. The use according to claim 8, characterized in that The plant pests are pests of the order Lepidoptera and / or Hemiptera.

10. The use according to claim 9, characterized in that The lepidopteran pests are beet armyworm, diamondback moth, cabbage looper or rice stem borer, and the hemiptera pests are aphids, whiteflies, Bemisia tabaci or brown planthopper.

11. The use according to claim 10, characterized in that The lepidopteran pest is beet armyworm; the hemiptera pest is aphid.

Images