CN104522010B - Synergistic acaricidal composition containing cyenopyrafen and bifenazate - Google Patents
Synergistic acaricidal composition containing cyenopyrafen and bifenazate Download PDFInfo
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Abstract
The invention relates to a synergistic acaricidal composition containing cyenopyrafen and bifenazate, wherein the weight part ratio of the cyenopyrafen to the bifenazate is 20: 1-1: 20, and the weight percentage of the sum of the weight of the cyenopyrafen and the bifenazate in the acaricidal composition is 5-85%. The two effective components are compounded, so that the composition has an obvious synergistic effect, and has excellent control effects on various mite pests on crops such as fruit trees, vegetables, cotton, tea trees and the like and flowers; the invention improves the control effect; the usage amount of the pesticide is reduced, so that the cost is reduced, the pollution to the environment is reduced, the resistance control of the pest mites is facilitated, and the popularization and the application of the pesticide have great economic benefit and social benefit.
Description
Technical Field
The invention relates to a pesticide composition and the application field thereof, in particular to a synergistic acaricidal composition taking cyenopyrafen and bifenazate as effective components, which is mainly applied to the control of acarid pests in agriculture.
Background
Cyenopyrafen: the novel pyrazole acaricide has the action mechanism that the acaricide is activated by metabolizing into a hydroxyl form to generate activity, the hydroxyl form inhibits mitochondria by disturbing a compound II on a respiratory electron transfer chain, thereby blocking electron transfer and destroying the oxidative phosphorylation process, is mainly used for preventing and treating various harmful mites on fruits, vegetables and tea leaves such as eggplants, hot peppers, cucumbers, pears, strawberries, citrus and the like, and has better quick action and lasting effect.
Bifenazate (bifenazate): the insecticidal composition is a novel hydrazine ester compound, has an action mechanism of an antagonist of mite gamma-aminobutyric acid (GABA), is effective to each growth stage of mites, has ovicidal activity and quick knock-down activity to adult and nymph mites, has small influence on natural enemies, and can be used for preventing and treating leaf mite pests on crops such as vegetables, fruit trees, strawberries and the like.
The problem of pesticide resistance of agricultural mite pests is a global problem and is a key topic concerned by agricultural science and technology workers. With the continuing of one year or another year of chemical control of mite pests, the increasing of the usage amount of pesticides, the influence of unscientific use of pesticides and other factors, the resistance of mite pests is increasingly serious, and the types of mite pests generating resistance are continuously increased. Meanwhile, due to the high-strength use of pesticides, a series of problems of overproof pesticide residues of agricultural products, aggravation of environmental pollution, increase of pesticide cost of farmers and the like are caused, and the sustainable development of agriculture is not facilitated.
Therefore, the compound preparation with high efficiency, low toxicity, low residue, different action mechanisms and synergistic interaction is developed, so that the pesticide resistance of mite pests can be delayed, the service life of pesticide varieties can be prolonged, the use dosage can be reduced, the cost can be saved, and the pollution to the environment can be reduced.
The inventor of the invention has conducted intensive research on screening of a compound formula of cyenopyrafen and bifenazate, and finds that the compounding of cyenopyrafen and bifenazate has an obvious synergistic effect within a certain compounding ratio range, and meanwhile, in the actual use process, the composition has an excellent control effect on various agricultural mite pests, and the invention is completed through further research.
Disclosure of Invention
The invention aims to provide an acaricidal composition containing cyenopyrafen and bifenazate, which has obvious synergistic interaction and can be used for controlling various mite pests in agriculture.
The invention also aims to provide the acaricidal composition containing cyenopyrafen and bifenazate, which can reduce the dosage, reduce the residual quantity of pesticides on crops, delay the generation of drug resistance of mite pests, obviously improve the control effect on various mite pests compared with the single dosage, save labor and money and reduce the burden of farmers.
The technical scheme of the invention is as follows: the effective components of the synergistic acaricidal composition consist of cyenopyrafen and bifenazate, the weight part ratio of the cyenopyrafen to the bifenazate is 20: 1-1: 20, the weight percentage of the total weight of the cyenopyrafen and the bifenazate in the acaricidal composition is 5-85%, and the balance is auxiliary components which are allowed to be used and accepted in pesticides.
The pesticide composition can be prepared into any one of dosage forms suitable for agriculture by adopting a known method, and the better dosage forms are suspending agents, aqueous emulsion, microemulsion, water dispersible granules, wettable powder, ultra-low volume liquid agents, microcapsule suspending agents and hot fogging concentrate.
The adjuvants used in the composition of the present invention include solvents, dispersants, stabilizers, emulsifiers, antifreezes, thickeners, and other known substances useful for stabilizing and exerting the effects of the active ingredients in the formulation, and are various ingredients commonly used or allowed to be used in the formulation of agricultural chemicals, and are not particularly limited, and the specific ingredients and amounts thereof are determined by simple experiments according to the formulation requirements.
The products described herein may be provided in the form of a finished formulation, i.e. the components of the composition have been mixed, or the components of the composition may be provided in a single dose, mixed in a tank or pail immediately prior to use, and then diluted to the required concentration.
The acaricidal composition is suitable for preventing and controlling various mite pests on crops such as fruit trees, vegetables, cotton, tea trees and the like and flowers.
The application frequency and application amount of the acaricidal composition of the invention are changed along with the change of weather conditions and crop conditions, and the control purpose can be achieved by using proper dosage forms.
Compared with the prior art, the invention has the advantages that:
1. the combination of cyenopyrafen and bifenazate has a synergistic effect, obviously improves the control effect on mite pests compared with the single agent used alone, simultaneously enlarges the insecticidal spectrum, and overcomes the defect of poor effect on certain mite pests when the single agent is used alone.
2. The two effective components of cyenopyrafen and bifenazate are compounded, so that the use amount of pesticide is reduced, the use cost is reduced, the pollution to the environment is reduced, the generation of drug resistance of mite pests is delayed, and the service life of the pesticide is prolonged.
Detailed Description
For a better understanding of the nature of the present invention, its contents are further described below in conjunction with the following examples, which are not to be considered as limiting, but are to be construed to illustrate the present invention and all changes, substitutions and modifications that do not depart from the spirit and principles of the present invention are intended to be within the scope of the appended claims.
In the following examples, 96% cyenopyrafen raw pesticide and 97% bifenazate raw pesticide are adopted as active ingredients, and the percentage content of each component is weight percentage content.
Formulation example 1: 25% cyenopyrafen-bifenazate suspending agent.
5% of cyenopyrafen, 20% of bifenazate, 10% of lignosulfonate, 10% of alkylphenol polyoxyethylene ether phosphate, 1% of hydroxymethyl cellulose, 2% of glycerol, 0.1% of silicone oil and the balance of deionized water to 100%. The effective components, the dispersant, the wetting agent, the thickening agent, the antifreezing agent, the defoaming agent and the deionized water are mixed, and a high-dispersion and stable suspension system is formed in a water system medium through high-speed shearing dispersion and sand grinding in a sand mill, so that the 25% suspending agent of cyenopyrafen and bifenazate can be prepared.
Formulation example 2: 40% cyenopyrafen-bifenazate aqueous emulsion
10% of cyenopyrafen, 30% of bifenazate, 20% of coconut oil heptyl ester, 15% of fatty alcohol-polyoxyethylene ether, 5% of alkyl naphthalene sulfonate, 1% of sodium sorbate, 1% of triethylene glycol and the balance of deionized water to 100%. Mixing the effective components, the solvent, the emulsifier, the dispersant and the stabilizer to form an oil phase, dissolving the antifreezing agent in water to form a water phase, slowly adding the oil phase into the water phase under the action of a shearing machine, and continuously shearing for about 30 minutes to obtain the 40% cyenopyrafen-bifenazate aqueous emulsion.
Formulation example 3: 35% cyenopyrafen-bifenazate microemulsion.
10% of cyenopyrafen, 25% of bifenazate, 10% of cyclohexanone, 10% of N, N-dimethylformamide, 15% of nonylphenol polyoxyethylene ether, 1.5% of xylitol, 1.5% of organic silicon, 2% of thiazone and the balance of deionized water to 100%. The effective components are completely dissolved by solvent, then emulsifier, stabilizer, penetrant and synergist are added and mixed evenly, finally deionized water is added and stirred fully, thus obtaining the 35% cyenopyrafen-bifenazate microemulsion.
Formulation example 4: 70% cyenopyrafen-bifenazate wettable powder.
20% of cyenopyrafen, 50% of bifenazate, 5% of polycarboxylate, 10% of calcium dodecylbenzene sulfonate and the balance of diatomite to 100%. The effective components, the dispersant, the wetting agent and the filler are mixed, mechanically crushed, airflow crushed and mixed evenly to prepare the 70 percent nitrile pyraclostrobin-bifenazate wettable powder.
Formulation example 5: 60% cyenopyrafen-bifenazate water dispersible granule.
15% of cyenopyrafen, 45% of bifenazate, 10% of alkylphenol polyoxyethylene, 10% of sodium dodecyl benzene sulfonate, 3% of sodium sulfate, 2% of sodium carboxymethylcellulose and the balance of kaolin to 100%. The effective components, the dispersing agent, the wetting agent, the disintegrating agent, the binding agent and the filler are uniformly mixed, crushed by a superfine airflow crusher, kneaded, added into a fluidized bed granulation dryer for granulation, drying and screening, and then the 60% cyenopyrafen-bifenazate water dispersible granule is prepared.
Formulation example 6: 20% cyenopyrafen and bifenazate ultra-low volume liquid.
5% of cyenopyrafen, 15% of bifenazate, 10% of N-methylpyrrolidone, 15% of N, N-dimethylformamide, 2% of phenethyl phenol polyoxyethylene ether, 2% of castor oil polyoxyethylene ether, 1.5% of diclosamide and the balance of cottonseed oil to 100%. The effective components are stirred and dissolved by a solvent, then other auxiliary agents are added, and the mixture is fully stirred and uniformly mixed, so that the 20% cyenopyrafen-bifenazate ultra-low volume liquid is prepared.
Formulation example 7: 10% cyenopyrafen-bifenazate microcapsule suspending agent.
3% of cyenopyrafen, 7% of bifenazate, 10% of sodium alginate, 10% of linseed oil, 10% of polyoxyethylene lauryl ether, 2% of sodium hydroxide, 3% of polycarboxylate and the balance of deionized water to 100%. Mixing the effective components, the high-molecular capsule wall material and the solvent to dissolve the effective components into a uniform oil phase, adding the oil phase into an aqueous phase solution containing an emulsifier, a pH regulator and a dispersant under a shearing condition, complementing the balance with deionized water, and reacting the two materials at an oil-water interface to form a high-molecular capsule wall, thereby preparing the 10% cyenopyrafen-bifenazate microcapsule suspending agent.
Formulation example 8: 15% nitrile pyradiflora and bifenazate hot fogging concentrate.
5% of cyenopyrafen, 10% of bifenazate, 5% of cyclohexanone, 10% of N-methyl pyrrolidone, 8% of alkylaryl polyoxypropylene polyoxyethylene ether phosphate, 3% of sodium dodecyl sulfate, 2% of synergistic phosphorus, 1% of triphenyl phosphate and the balance of vegetable oil to 100%. The effective components and the solvent are put into a reaction vessel with stirring, after the effective components are fully dissolved, other auxiliary agents are added, the mixture is fully stirred for about 60 minutes, and the mixture is uniformly mixed, so that the 15 percent thermal fogging concentrate of cyenopyrafen and bifenazate is prepared.
Bioassay example 1: and (3) measuring the indoor combined toxicity of the cyenopyrafen and the bifenazate to the citrus red spiders.
Testing insects: selecting citrus red spider mites collected in the field and bred indoors by feeding.
Reagent to be tested: 96% of cyenopyrafen raw drug and 97% of bifenazate raw drug.
The test method adopts a butterfly spraying method, and the specific operation method is as follows:
selecting healthy citrus leaves, making butterfly leaves by using a puncher, placing a wet sponge block in a culture dish, placing filter paper on the wet sponge block, placing 2 butterfly leaves on each filter paper, selecting healthy citrus red spiders with consistent ages, inoculating the healthy citrus red spiders to the butterfly leaves, and inoculating 20 spider leaves to each butterfly leaf.
Placing the culture dish connected with the butterfly under a potter spray tower, spraying under the pressure of 50PSI, wherein the spraying amount is 1ml, taking out the culture dish after settling for 1min, then placing the treated culture dish into a 12H/12H illumination incubator for culturing at 25 ℃, checking the number of dead insects after 48H, and calculating the death rate. Repeat for 4 times and clear water blank control treatment.
Performing statistical analysis by DPS statistical analysis software to calculate LC of each medicament50And calculating the co-toxicity coefficient (CTC value) of the mixture according to the Sun Yunpei method.
Measured toxicity index (ATI) ═ standard medicament LC50Test agent LC50)×100。
Theoretical virulence index (TTI) ═ a agent virulence index x percent of a in the mixture + B agent virulence index x percent of B in the mixture.
Co-toxicity coefficient (CTC) × 100 [ measured toxicity index (ATI) of the mixture)/Theoretical Toxicity Index (TTI) of the mixture ].
According to NY/T11547.7-2006 pesticide combination division standard: the co-toxicity coefficient (CTC) is more than or equal to 120 and shows a synergistic effect; the co-toxicity coefficient (CTC) is less than or equal to 80, and the antagonism is shown; 80 < co-toxicity coefficient (CTC) < 120 showed additive effects.
Table 1, results of indoor combined virulence determination of cyenopyrafen and bifenazate against citrus red spider.
| Name and proportion of drug (weight ratio) | LC50(mg/L) | ATI | TTI | CTC |
| Cyenopyrafen-ethyl | 3.16 | 100.00 | - | - |
| Biphenyl hydrazine ester | 9.74 | 32.44 | - | - |
| Cyenopyrafen Bifenazate (20:1) | 2.43 | 130.04 | 96.78 | 134.37 |
| Cyenopyrafen Bifenazate (10:1) | 2.15 | 146.98 | 93.86 | 156.59 |
| Cyenopyrafen Bifenazate (5:1) | 1.98 | 159.60 | 88.74 | 179.85 |
| Cyenopyrafen Bifenazate (1:1) | 2.51 | 125.90 | 66.22 | 190.12 |
| Cyenopyrafen Bifenazate (1:5) | 4.13 | 76.51 | 43.70 | 175.08 |
| Cyenopyrafen Bifenazate (1:10) | 5.26 | 60.08 | 38.58 | 155.73 |
| Cyenopyrafen Bifenazate (1:20) | 6.81 | 46.40 | 35.66 | 130.12 |
As can be seen from Table 1, when cyenopyrafen and bifenazate are compounded in the weight ratio of 20: 1-1: 20, the co-toxicity coefficient (CTC) is greater than 120, the synergistic effect is shown on citrus red spiders, and the compounding of cyenopyrafen and bifenazate is reasonable and feasible.
Bioassay example 2: field efficacy test of cyenopyrafen and bifenazate compound on citrus red spiders
The 25% cyenopyrafen-bifenazate suspending agent (preparation example 1) is used for preventing and treating citrus red spiders, the population base number is investigated before application, the number of residual live mites is investigated at 7d, 14d and 30d after application, 2 plants are investigated in each cell during investigation, 5 leaves are respectively investigated in the east, west, south and north directions of each plant, 40 leaves are investigated in each cell in total, the number of live mites is recorded, and the prevention and treatment effect is calculated. The control effect calculation method comprises the following steps:
the control effect (%) - (1-CK)1×Pt1/CK2×Pt2)×100。
Wherein: CK (CK)1Representing the population of the insect before the drug in the control area; pt1Representing the number of insect population after the treatment area is filled with the drug;
CK2representing the number of insect population after drug administration in the control area; pt2Representing the number of insect population before drug treatment in the treatment area;
table 2, test results of each treatment agent for controlling citrus red mites.
As can be seen from the table 2, when the 25% cyenopyrafen-bifenazate suspending agent uses the effective component concentration of 150-180mg/kg, the control effect of 7d, 14d and 30d after the suspension on citrus red spiders is better than that of each single agent, and the control effect of 30d after the suspension is still more than 80%, which indicates that the compound preparation has good persistence. The compound medicament is not found to cause phytotoxicity to citrus in the process of experimental investigation.
In conclusion, the compound pesticide composition has a synergistic effect by adopting the two active components of cyenopyrafen and bifenazate, has the advantages of obviously improved insecticidal effect, long lasting period and safety to crops compared with the existing single preparation, and is worthy of popularization and application in agricultural production.
Claims (3)
1. A synergistic acaricidal composition containing cyenopyrafen and bifenazate is characterized in that: the effective components comprise cyenopyrafen and bifenazate, the weight part ratio of the cyenopyrafen to the bifenazate is 20: 1-1: 20, and the weight percentage of the total weight of the cyenopyrafen and the bifenazate in the acaricidal composition is 5-85%.
2. The synergistic acaricidal composition according to claim 1, which comprises cyenopyrafen and bifenazate, and is characterized in that: the preparation formulation which is prepared into a formulation suitable for agriculture in practical application is suspending agent, aqueous emulsion, microemulsion, water dispersible granule, wettable powder, ultra-low volume liquid, microcapsule suspending agent or hot fogging concentrate.
3. The use of a synergistic acaricidal composition according to claim 1 or 2, containing cyenopyrafen and bifenazate, for the agricultural control of various acarids.
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| CN105766925B (en) * | 2014-12-25 | 2019-04-09 | 中化农化有限公司 | A kind of composition pesticide of the mite of pyrrole containing nitrile ester and its application |
| CN111226945B (en) * | 2018-11-29 | 2021-11-23 | 沈阳中化农药化工研发有限公司 | Synergistic insecticidal and acaricidal composition |
| CN111264548A (en) * | 2018-12-04 | 2020-06-12 | 浙江省化工研究院有限公司 | Composition containing bifenazate |
| CN115918664B (en) * | 2022-11-15 | 2024-04-02 | 江西红土地化工有限公司 | Acaricidal composition containing cyenopyrafen and 4-phenoxy-2, 6-diisopropylphenyl thioisocyanate and application thereof |
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