CN106857636A - A kind of Synergistic insecticidal compositions containing double third ring worm esters - Google Patents

Abstract

The invention discloses a kind of Synergistic insecticidal compositions containing double third ring worm esters, its active ingredient is double third ring worm esters and ring bromine insect amide, and both mass ratioes are 50:1~1:50, the gross mass percentage composition of active ingredient is 0.9%~85% in composition.The present composition can be configured to suspending agent, microemulsion, aqueous emulsion, microcapsule suspending agent, suspension seed-coating agent, granule or the water dispersible granules for agriculturally allowing.Instant component is reasonable, there is favorable effect to the pierce-suck types such as the aleyrodid and thrips on oranges and tangerines and vegetable crop and rasping-sucking mouthparts insect, compared with existing unitary agent, with significant insecticidal effect, and have significant synergistic effect, Pesticide use amount is reduced, so as to reduce cost and reduce the pollution to environment, be conducive to the improvement of pest resistance to insecticide, its popularization and application has larger economic and social benefit.

Description

A kind of synergistic insecticidal composition containing dipropacyclopyrene

technical field

The invention relates to a synergistic insecticidal composition, in particular to a synergistic insecticidal composition containing dipropacyclopyrene and its application in controlling small pests on crops, belonging to the technical field of compound pesticides.

Background technique

Common small pests such as whitefly and thrips have the characteristics of wide host range, fast reproduction, many annual generations and easy resistance to pesticides, which cause great losses to agricultural production. Beta-cyhalothrin, insect growth regulators such as buprofezin, and neonicotinoids such as imidacloprid, thiamethoxam, and acetamiprid have developed relatively high resistance. Therefore be badly in need of a kind of highly efficient and low-toxic medicament of preventing and treating small pests such as whitefly and thrips on the market.

Afidopyropen, common name in English: afidopyropen, is a botanical pesticide with a novel structure and a new mechanism of action. It can be used to control small pests on rice, fruit trees, vegetables, row crops and ornamental plants, such as scale insects, Thrips, leafhoppers, whiteflies and psyllids, etc., have good effects no matter foliar treatment, seed treatment or soil treatment, and the toxicity is very low.

Cyclic bromide, the common name in English is cyclaniliprole, the test code is IKI-3106, developed by Ishihara Sangyo Co., Ltd. in Japan. Cyclotraniliprole has broad-spectrum insecticidal activity, and has a good killing effect on diamondback moth, Spodoptera litura, whitefly, aphids, thrips, housefly, Liriomyza sativae, termites, etc., and has a good killing effect. Systemic activity. Traditional bisamide insecticides act on the ryanodine receptor (RyR) of the calcium ion release channel in insects, and the main action site of cyclobromide is the allomer of the ryanodine receptor, not completely ryanodine Receptor acting agent, which is different from other bisamide insecticides. In the fourth quarter of 2013, Shiyuan applied for the registration of the insecticide Cyclotraniliprole in Japan and the European Union, and applied for the registration of the product in the United States, Canada and Australia in the first quarter of 2014.

Up to now, there has not been any report on compounding dipropacyclopyrene and cyclotraniliprole.

Contents of the invention

The purpose of the present invention is to provide a synergistic insecticidal composition suitable for agricultural use, which helps to reduce the dosage, delay the development of resistance of pests and reduce the cost of use.

In order to overcome the deficiencies of the prior art, the inventors have unexpectedly discovered through a large number of indoor bioassays that the compounding of dipropacyclotran and cyclotraniliprole in a certain ratio has a significant synergistic effect on whitefly and thrips.

The technical solution of the present invention is: a synergistic insecticidal composition containing diproteril, which is characterized in that: it contains the active ingredients diproteril and cyclobromide, and the mass ratio of the two is 50:1 ～1:50, preferably the mass ratio is 10:1～1:10, more preferably the mass ratio is 1:1.

In the insecticidal composition of the present invention, the total mass percentage of active ingredients is 0.9% to 85%, and the rest are adjuvants, fillers and other known substances that are beneficial to the stability of active ingredients in storage and use and the exertion of drug effects .

The pesticide composition of the present invention can be prepared into any dosage form suitable for agricultural use by known methods, and the preferred dosage forms include suspensions, microemulsions, emulsions in water, microcapsule suspensions, suspension seed coatings, and granules. Or water dispersible granules.

The pesticide composition also contains common auxiliary agents required for the preparation of agricultural chemical preparations. Common auxiliary agents are dispersants, emulsifiers, wetting agents, stabilizers, thickeners, defoamers, antifreeze agents, fillers, etc. One or more mixtures are various adjuvants commonly used in pesticide preparations, and are not particularly limited, and may vary according to different situations.

The pesticide composition is used to prevent and control pests on crops. The pesticide composition described in the present invention can be provided in the form of a finished preparation, that is, in the form of a mixture, and the components of the composition can also be provided in a single dose. Mix proportionately in a bucket or tank, then dilute to desired concentration.

Compared with the prior art, the beneficial effects produced by the present invention are as follows: (1) the synergistic effect of the composition is obvious, and the control effect is significantly improved compared with that of a single agent; The cost reduces pesticide residues and environmental pollution; (3) the composition is composed of active ingredients with different action mechanisms, and the number of action sites is increased, which is beneficial to overcome and delay the development of resistance of pests.

detailed description

In order to make the object, technical solution and advantages of the present invention more clear, the present invention is illustrated with the following specific examples, but the present invention is by no means limited to these examples.

Compounding the active ingredients of pesticides with different structural types is an effective measure to solve the problems of cost and resistance in the process of single-dose use of pesticides. After the active ingredients of pesticides with different structural types are mixed, they usually exhibit three types of effects, namely additive effect, synergistic effect and antagonistic effect. However, the specific role cannot be predicted, and conclusions can only be drawn through a large number of experiments. The formula with better compound synergy can improve the actual control effect, reduce the dosage of pesticides, and help delay the emergence of resistance. It is one of the important means of resistance management.

The composition of the present invention has obvious synergistic effect on whitefly and thrips, not just the simple addition of the effects of the two agents, which can be clearly seen from the results of the following indoor toxicity test.

Biological Assay Example 1: Indoor Combined Toxicity Test of Diproterran and Cyclotraniliprole Compound on Thrips

Test object: Western flower thrips Franjliniella occidentalis (Pergande), eggplant seedlings raised artificially for seven generations in constant temperature seedlings.

Test method: The test refers to the "People's Republic of China Agricultural Industry Standard NY/T 1154.14-2008" and uses the leaf soaking method for determination. Soak the cabbage leaves (3㎝×4㎝) prepared in advance in the liquid medicine for 10 seconds, take them out and dry them naturally until there are no water marks on the surface, pick the 3rd instar nymphs of Thrips occidentalis with a brush, and remove the test insects To (25±1) ℃, 14/10 (L/D), relative humidity 70% in the greenhouse for normal cultivation. Each treatment was repeated 4 times, with 30 test insects per repetition.

Mortality (%) = number of dead insects/total number of treated insects*100

Corrected mortality rate (%) = (death rate in treatment group - mortality rate in control group) / (1 - mortality rate in control group) * 100

DPS9.50 statistical analysis software was used for statistical analysis, and the LC ₅₀ of each drug was calculated by correcting the mortality rate of each treatment with different concentration gradients, and then the co-toxicity coefficient (CTC) was calculated according to Sun Yunpei's method.

When CTC≦80, the composition exhibits antagonistic effect; when 80<CTC<120, the composition exhibits additive effect; when CTC≧120, the composition exhibits synergistic effect.

Actual toxicity index (ATI) = (standard drug LC ₅₀ / test drug LC ₅₀ ) × 100

Theoretical toxicity index (TTI) = Toxicity index of agent A × percentage of A in the mixture + toxicity index of agent B × percentage of B in the mixture

Co-toxicity coefficient (CTC) = [measured toxicity index (ATI) of mixture/theoretical toxicity index (TTI) of mixture]×100. The results of the toxicity test are shown in Table 1.

Table 1. The results of indoor joint toxicity test of dipropterate and cyclobromide to Thrips occidentalis

As can be seen from the test results in Table 1, when the proportioning ratio of dipropacyclotran and cyclotraniliprole is between 50:1～1:50, the co-toxicity coefficient to western flower thrips is all above 120, has Synergistic effect, especially when the ratio is between 10:1 and 1:10, the synergistic effect is obvious, and its co-toxicity coefficient is above 220, especially when the compounding ratio is 1:1, the synergistic effect is the most significant. The toxicity coefficient is 370.35.

Biological Assay Example 2: Indoor Combined Toxicity Test of Dipropacyclotran and Cyclotraniliprole Compound on Whitefly

Test object: whitefly Bemisia tabaci (Gennadius), which was reared indoors for nine generations with cucumber seedlings.

Test method: The test refers to the "People's Republic of China Agricultural Industry Standard NY/T 1154.14-2008" and uses the leaf soaking method for determination. Soak the cucumber leaves (3㎝×4㎝) prepared in advance in the liquid medicine for 10 seconds, take them out and let them dry naturally until there are no water marks on the surface. Use a brush to pick out whitefly adults of the same age and put them into the insect rearing box. Then, transfer to (25±1)°C, 14/10 (L/D), 70% relative humidity in a greenhouse for normal cultivation. Each treatment was replicated 4 times, with 50 test insects per replicate. The number of dead insects was checked at 72h, and the mortality rate and corrected mortality rate were calculated. If the control mortality rate was greater than 10%, the experiment was considered invalid.

The statistical analysis method is the same as that in the biological assay example 1, and the toxicity assay results are shown in Table 2.

Table 2. Indoor combined toxicity test results of dipropacyclotran and cyclotraniliprole against Bemisia tabaci

From the test results in Table 2, it can be seen that when the ratio of dipropacyclotran and cyclotraniliprole is between 50:1 and 1:50, the co-toxicity coefficients to Bemisia tabaci are all above 120, which has an increasing effect. The synergistic effect, especially when the ratio is between 10:1 and 1:10, the synergistic effect is obvious, and its co-toxicity coefficient is above 220, especially when the compound is 1:1, the synergistic effect is the most significant, and the co-toxicity coefficient The coefficient is 350.86.

The pesticidal composition of the present invention can be prepared by known methods into suspensions, microemulsions, emulsions in water, microcapsule suspensions, seed coating suspensions, granules or water-dispersible granules suitable for agricultural use. The following descriptions are only preferred embodiments of the present invention, and are only used to explain the present invention, and should not be construed as limiting the patent scope of the present invention.

Formulation Example 1: 51% Dipropyrene-Cyclotraniliprole Water-Dispersible Granules

Dipropyrene 50%, Cyclotraniliprole 1%, Sodium Alkyl Naphthalene Sulfonate 6%, Calcium Dodecylbenzene Sulfonate 10%, Calcium Alkyl Sulfate 5%, Glucose 3%, Supplemented with Diatomaceous Earth 100%. The above-mentioned raw materials are pulverized with an ultra-fine airflow pulverizer, kneaded, and then added to a fluidized bed granulation dryer for granulation, drying, and sieving to obtain a 51% dipropacyclopyrene "ring Bromotraniliprole water dispersible granules.

Formulation Example 2: 31% Dipropteriprex-Cyclotraniliprole Water Emulsion

Dipropetranil 30%, Cyclotraniliprole 1%, N-Methylpyrrolidone 5%, Nongru 800#4%, Tween-60#3%, Nongru 2201#4%, Epichlorohydrin 6 %, sodium benzoate 3%, polyethylene glycol 3%, and deionized water make up 100%. Mix the above raw materials to form an oil phase, dissolve the antifreeze agent in water to form a water phase, slowly add the oil phase to the water phase under the action of a shearing machine, and continue shearing for about 30 minutes to obtain 31% diprocyclone Ester " cyclotraniliprole emulsion in water.

Formulation Example 3: 21% Diproterran-Cyclotraniliprole Microemulsion

Dipropetrin 20%, Cyclotraniliprole 1%, N-Methylpyrrolidone 8%, Nongru 2201# 5%, Alkyl Sodium Sulfate 10%, Alkyl Naphthalene Sulfonate 5%, Silicone 3% , Thione 4%, deionized water to make up 100%. Completely dissolve the active ingredients of the above ingredients with a solvent, then add other raw materials and mix them evenly, and finally add deionized water, and after fully stirring, a 21% dipropterapran and cyclotraniliprole microemulsion can be prepared.

Formulation Example 4: 11% Dipropyrene-Cyclotraniliprole Suspension Concentrate

Dipropyrene 10%, Cyclotraniliprole 1%, Alkyl polyoxyethylene ether sulfonate 4%, Alkylphenol formaldehyde resin polyoxyethylene ether 4%, Carboxyethyl cellulose 3%, Sorbitol 3 %, silicone oil 0.8%, and deionized water make up 100%. The above raw materials are fully mixed, and after high-speed shear dispersion and sand milling in a sand mill, a highly dispersed and stable suspension system is formed in an aqueous medium to obtain 11% dipropterapran and cyclotraniliprole suspension agent.

Formulation Example 5: 27% Dipropterate-Cyclotraniliprole Microcapsule Suspension

Dipropyrene 24%, Cyclotraniliprole 3%, Polymer capsule wall material polymer MDI 3%, Solvent linseed oil 5% and S-180 solvent oil 8%, Emulsifier Alkylphenol formaldehyde resin polyoxyethylene ether 4%, dispersant sodium alkyl naphthalene sulfonate 5%. Mix the above active ingredients, polymer capsule wall materials, and solvents to dissolve into a uniform oil phase, and dissolve the emulsifier and dispersant in water to prepare a uniform water phase. Under shearing conditions, add the oil phase to the water phase solution, Prepare an emulsion, add 4% of 10% ethylenediamine aqueous solution under stirring, heat up to 65°C and keep it warm for 4.0 hours, the two materials react at the oil-water interface to form a polymer cyst wall, and 27% diprotera can be prepared Ester " cyclotraniliprole microcapsule suspension.

Formulation Example 6: 1% Diproteril·Cyclotraniliprole Granules

Dipropyrene 0.8%, Cyclotraniliprole 0.2%, Chitin 3.8%, Dioctyl sulfosuccinate sodium 2%, Naphthalene sulfonate formaldehyde condensate 2%, Sucrose 5%, Carboxymethyl cellulose 1%, calcium carbonate 10%, ammonium chloride 20%, and diatomaceous earth make up to 100%. Mix the above formula components evenly, pulverize them, add water to moisten them, stir well, then granulate with a screw extruder granulator, dry and sieve to obtain 1% diproteril·cyclaniliprole granules.

Formulation Example 7: 30% Dipropyrene-Cyclotraniliprole Suspension Seed Coating

Diproterran 20%, Cyclotraniliprole 10%, Polyvinyl acetate and polyvinyl alcohol polymer 7%, Ethylene glycol 1.5%, Polyvinyl acetate 6%, Polyethylene resin 4%, Xanthan Glue 0.5%, organic silicones 0.5%, potassium benzoate 0.5%, basic rhodamine 1.5%, and distilled water make up 100%. According to the above formula, the dipropterap and cyclotraniliprole were pulverized by air flow, and the wetting and dispersing agent, film forming agent, colorant, thickener, antifreeze, preservative, defoamer and distilled water were completely dissolved, Proportionally put into a sand mill and grind twice until the particle fineness of the suspension reaches _D50 of 2 μm and _D90 <8 μm, and then 30% diproterapran and cyclotraniliprole suspension seed coating agent can be obtained.

Formulation Example 8: 40% Diproterran-Cyclotraniliprole Suspension Concentrate

Dipropetranil 20%, Cyclotraniliprole 20%, Sodium Alkylphenol Polyoxyethylene Ether Sulfonate 3%, Sodium Alkyl Polyoxyethylene Ether Sulfonate 5%, Carboxyethylcellulose 3%, Propyl cellulose Triol 4%, silicone oil 0.8%, deionized water make up 100%. Mix the above-mentioned raw materials with deionized water, disperse with high speed shearing, sand mill in a sand mill, and form a highly dispersed and stable suspension system in an aqueous medium to obtain 40% dipropacyclopyrene. Bromotraniliprole Suspending Concentrate.

Formulation Example 9: 24% Diproterran-Cyclotraniliprole Microemulsion

Dipropetrin 8%, Cyclotraniliprole 16%, N-Methylpyrrolidone 8%, Nongru 1601# 4%, Alkylphenol Polyoxyethylene Ether Phosphate 8%, Epichlorohydrin 3%, Silicone 3%, Thione 5%, deionized water make up 100%. Completely dissolve the active ingredients of the above ingredients with a solvent, then add other raw materials and mix evenly, finally add deionized water, and after fully stirring, a 24% dipropterapran and cyclotraniliprole microemulsion can be prepared.

Formulation Example 10: 85% Dipropyrene-Cyclotraniliprole Water-Dispersible Granules

Diproterran 17%, Cyclotraniliprole 68%, Sodium Lignosulfonate 3%, Sodium Naphthalene Sulfonate 3%, Calcium Alkyl Naphthalene Sulfonate 2%, Polyvinyl Alcohol 3%, White Carbon Black Supplement 100 %. The above-mentioned raw materials are pulverized with an ultra-fine jet mill, kneaded, and then added to a fluidized bed granulation dryer for granulation, drying, and sieving to obtain 85% diproteril and cyclotraniliprole water Dispersible granules.

Formulation Example 11: 0.9% Dipropterate-Cyclotraniliprole Granules

Dipropyrene 0.1%, Cyclotraniliprole 0.8%, Chitin 3.8%, Dioctyl sulfosuccinate sodium 2%, Naphthalene sulfonate formaldehyde condensate 2%, Starch 4%, Carboxymethyl cellulose 1%, sodium sulfate 12%, ammonium chloride 20%, and diatomaceous earth make up to 100%. Mix the above formula components evenly, pulverize them, add water to moisten them, stir them well, then granulate them with a screw extrusion granulator, dry them and sieve them to get 0.9% diproterran-cyclopranil granules.

Formulation Example 12: 22% Diproterran-Cyclotraniliprole Microcapsule Suspension

Dipropterpene 2%, Cyclotraniliprole 20%, Polymer capsule wall material polymer MDI 3%, Solvent linseed oil 5% and S-180 solvent oil 8%, Emulsifier Tristyryl phenol polyoxyethylene ether Phosphate ester 4%, dispersant sodium alkyl naphthalene sulfonate 6%. Mix the above active ingredients, polymer capsule wall materials, and solvents to dissolve into a uniform oil phase, and dissolve the emulsifier and dispersant in water to prepare a uniform water phase. Under shearing conditions, add the oil phase to the water phase solution, Prepare an emulsion, add 4% of 10% ethylenediamine aqueous solution under stirring, raise the temperature to 65°C and keep it warm for 4.0 hours, the two materials react at the oil-water interface to form a polymer cyst wall, and 22% diprotera can be prepared Ester " cyclotraniliprole microcapsule suspension.

Formulation Example 13: 42% Dipropterate-Cyclotraniliprole Water Emulsion

Dipropetrin 2%, Cyclotraniliprole 40%, N-Methylpyrrolidone 5%, Nongru 2201#3%, Span-60#3%, Nongru 1601#4%, Epoxy soybean oil 5 %, benzoic acid 4%, sorbitol 5%, and deionized water make up 100%. Mix the above raw materials to form an oil phase, and dissolve the antifreeze agent in water to form a water phase. Slowly add the oil phase to the water phase under the action of a shearing machine, and continue shearing for about 30 minutes to obtain 42% diprocyclone Ester " cyclotraniliprole emulsion in water.

Formulation Example 14: 62% Dipropterapran-Cyclotraniliprole Water-Dispersible Granules

Dipropetranil 2%, Cyclotraniliprole 60%, Sodium Alkyl Naphthalene Sulfonate 6%, Calcium Dodecyl Benzene Sulfonate 10%, Calcium Alkyl Sulfate 5%, Glucose 3%, White Carbon Black Supplement 100%. The above-mentioned raw materials are pulverized with an ultra-fine airflow pulverizer, kneaded, and then added to a fluidized bed granulation dryer for granulation, drying, and sieving to obtain a 62% diproteril "ring Bromotraniliprole water dispersible granules.

Formulation Example 15: 51% Dipropterapran-Cyclotraniliprole Suspension Seed Coating

1% dipropteraprene, 50% cyclotraniliprole, 7% polymer of polyvinyl acetate and polyvinyl alcohol, 1.5% glycerol, 6% polyoxyethylene phenol formaldehyde condensate, polyethylene resin 4 %, Magnesium Aluminum Silicate 1%, Organic Silicones 0.5%, Sodium Salicylate 0.5%, Water Rose Red 1.5%, Distilled water make up 100%. According to the above formula, the dipropterap and cyclotraniliprole were pulverized by air flow, and the wetting and dispersing agent, film forming agent, colorant, thickener, antifreeze, preservative, defoamer and distilled water were completely dissolved, Put it into a sand mill in proportion and grind it twice until the particle fineness of the suspension reaches _D50 of 2 μm and _D90 <8 μm, then a 51% diproterapran and cyclotraniliprole suspension seed coating agent can be obtained.

Field application example 1: Field efficacy test of dipropacyclotran and cyclotraniliprole compounded on eggplant thrips

The subject of the test is the Western flower thrips Franjliniella occidentalis (Pergande), and the experiment is carried out on the eggplant in Xincun Farm, Dongfang City, Hainan Province. Mark 10 eggplant seedlings in each plot, investigate the insect population base before spraying, and investigate the number of residual live insects 1 day, 3 days and 7 days after spraying, and spray water in the blank control area to calculate the control effect.

Insect population reduction rate% = (Insect population base before treatment - number of live insects after treatment) / Insect population base before treatment * 100

Control effect (%) = (reduction rate of insect population in treatment area-reduction rate of insect population in blank area)/(100-reduction rate of insect population in blank area)*100

Table 3. Field efficacy test results of the compound agent of dipropterate and cyclotraniliprole in the control of eggplant western flower thrips

From the test results in Table 3, it can be seen that in the field efficacy test of the compound agent of dipropterate and cyclotraniliprole in the control of eggplant western flower thrips, the control effect of 1d, 3d and 7d after treatment was significantly higher than that of the control The control effects of 10% dipropteriprene suspension concentrate and 50g/L cyclotraniliprole soluble solution show that the combination of dipropteriprene and cyclotraniliprole has quick-acting and long-lasting effects on western flower thrips Sex is better than two kinds of single agents, and the control effect on western flower thrips is obvious. At the same time, it was also observed that all the chemicals had no effect on eggplant seedlings and natural enemies during the test.

Field Application Example 2: Field Efficacy Test of Dipropacyclotran and Cyclotraniliprole Compound on Pepper Bemisia tabaci

The experiment was conducted in Beiyang Village, Beiyang Village, Boye County, Baoding City, Hebei Province. The test crop was hot pepper in greenhouses. There were 10 trees per repetition, 4 repetitions per treatment, and the total number of Bemisia tabaci (nymphs + adults) was investigated for each tree. , investigate the population base of Bemisia tabaci before spraying, and investigate the number of residual living insects 3d, 7d, and 14d after spraying, and calculate the control effect. The control effect calculation method is as follows:

Insect population reduction rate% = (Insect population base before treatment - number of live insects after treatment) / Insect population base before treatment * 100

Control effect (%) = (reduction rate of insect population in treatment area-reduction rate of insect population in blank area)/(100-reduction rate of insect population in blank area)*100

Table 4. Field efficacy test results of the compound agent of dipropterate and cyclotraniliprole against whitefly on pepper

From the test results in Table 4, it can be seen that in the field efficacy test of the compound agent of dipropacyclotran and cyclotraniliprole in the control of Bemisia tabaci, the control effect of 3d, 7d and 14d after treatment was higher than that of the control single agent The control effect of 10% dipropteripran suspension concentrate and 50g/L cyclotraniliprole soluble solution shows that the quick-acting and persistent effects of the dipropteripran-bromotraniliprole compound agent on Bemisia tabaci are average. It is better than the two single agents, and has a good control effect on Bemisia tabaci. At the same time, during the test, it was also observed that each agent was safe to pepper and had no effect on natural enemies.

As can be seen from the test results of the above field drug efficacy test examples, the insecticidal composition of the present invention has a good control effect on eggplant western flower thrips and capsicum bemisia tabaci, and the quick-acting performance of the composition is greatly improved compared with a single agent. Durability is also improved. During the test, the chemicals were safe to the tested crops and had no effect on natural enemies.

Claims (7)

1. A synergistic insecticidal composition containing diproteril, characterized in that: the active ingredients of the insecticidal composition are diproteril and cyclobromide, and the mass ratio of the two is 50 :1～1:50. 2 . The synergistic insecticidal composition according to claim 1 , characterized in that the mass ratio of the active ingredients dipropacyclopyrid and cyclotraniliprole is 10:1˜1:10. 3. The synergistic insecticidal composition according to claim 2, characterized in that: the mass ratio of the active ingredients dipropacyclopyrid and cyclobromide is 1:1. 4. The synergistic insecticidal composition according to any one of claims 1 to 3, characterized in that: the total mass percentage of active ingredients in the insecticidal composition is 0.9% to 85%. 5. The synergistic insecticidal composition according to claim 4, characterized in that: during actual application, it is made into any dosage form suitable for use in agriculture, and its dosage form is suspension concentrate, microemulsion, water emulsion, microcapsule suspension elixirs, suspension seed coatings, granules or water dispersible granules. 6. The application of the synergistic insecticidal composition according to claims 1-5 for controlling small pests on rice and vegetable crops. 7. The application of the synergistic insecticidal composition according to claim 6, characterized in that: the small pests are whitefly and thrips.