阅读说明：本技术 防治蔬菜小菜蛾的增效组合物及制备方法 (Synergistic composition for preventing and controlling vegetable plutella xylostella and preparation method thereof ) 是由 王肖 高忠文 刘吉梅 尹文聚 邓如自 姜建辉 于 2020-05-26 设计创作，主要内容包括：本发明属于农药制剂加工技术领域,涉及一种防治蔬菜小菜蛾的增效组合物及制备方法。蓖麻油和烷基糖苷两者混合使用优势互补,利用烷基糖苷的水溶性和乳化性提高了蓖麻油在水中的乳化分散性,有利于蓖麻油的渗透性能和保湿性能发挥。蓖麻油和烷基糖苷两者均具有良好的渗透性能,将蓖麻油和烷基糖苷组合增效剂按10-40%用量加入到5%甲维·虱螨脲悬浮剂配方中,使产品的具有优良的润湿渗透性,对提高对蔬菜小菜蛾的防治效果有较好作用。蓖麻油和烷基糖苷均易生物降解,大量应用不会对环境造成污染。(The invention belongs to the technical field of pesticide preparation processing, and relates to a synergistic composition for preventing and treating vegetable plutella xylostella and a preparation method thereof. The advantages of the castor oil and the alkyl glycoside are complementary when the castor oil and the alkyl glycoside are mixed, the emulsifying dispersibility of the castor oil in water is improved by utilizing the water solubility and the emulsifying property of the alkyl glycoside, and the permeation performance and the moisturizing performance of the castor oil are favorably exerted. The castor oil and the alkyl glycoside both have good permeability, and the castor oil and the alkyl glycoside combined synergist are added into a 5% Formica Fusca and lufenuron suspending agent formula according to the dosage of 10-40%, so that the product has excellent wetting permeability and has better effect of improving the control effect on vegetable plutella xylostella. Both castor oil and alkyl glycoside are easy to biodegrade, and the environmental pollution can not be caused by a large amount of application.)

1. The synergistic composition for preventing and controlling vegetable plutella xylostella is characterized by comprising castor oil, alkyl glycoside, castor oil polyoxyethylene ether and propylene glycol.

2. The synergistic composition for controlling vegetable plutella xylostella according to claim 1, wherein the mass portions of the substances are 30-60 portions of castor oil, 10-20 portions of alkyl glycoside, 5-15 portions of castor oil polyoxyethylene ether and 5-65 portions of propylene glycol.

3. The 5% lufenuron suspension concentrate comprising the synergistic composition for controlling vegetable diamond back moths as claimed in claim 1 or 2, characterized in that the mass percentages of the substances are as follows:

emamectin benzoate 1.0%

4.0 percent of lufenuron

Polycarboxylate dispersant 2.0%

EO/PO block polyether 1.0%

Preservative BIT 200.2%

Xanthan gum 0.2%

10 to 40 percent of synergistic composition

0.4 percent of defoaming agent

And supplementing deionized water to 100 percent.

4. The preparation method of the 5% lufenuron-methyl suspending agent as claimed in claim 3, characterized in that castor oil and castor oil polyoxyethylene ether are preheated at 40-50 ℃, added into a container in proportion for mixing, then added with alkyl glycoside and propylene glycol in proportion, stirred at normal temperature for 200 r/min for 20-30 min until the sample is uniform, and a synergist mixture is prepared; weighing deionized water, polycarboxylate dispersant, EO/PO block polyether, defoamer, preservative BIT20 and xanthan gum, mixing and stirring uniformly, then adding the original emamectin benzoate and the original lufenuron in proportion, grinding by a sand mill until D90 is less than 5 mu m, adding the synergistic composition in proportion, and stirring uniformly to obtain the product.

Technical Field

The invention belongs to the technical field of pesticide preparation processing, and relates to a synergistic composition for preventing and treating vegetable plutella xylostella and a preparation method thereof.

Background

Plutella xylostella (Plutella xylostella L.) also called Trichinella, belongs to Lepidoptera (Lepidotera) Plutella family (Plutellidae), is a worldwide important vegetable pest, mainly harms Brassicaceae vegetables such as cabbage, Chinese cabbage, rape, cabbage heart, radish and the like, and hosts more than 40. The diamondback moth has high propagation speed, more generations and serious generation overlapping phenomenon, so the prevention and control difficulty is higher. At present, chemical control is mainly used for controlling diamondback moths. The chemical pesticide is continuously used in large quantity, so that the drug resistance of the diamondback moth is increasingly serious, the resistance level is also increasingly high, and the diamondback moth becomes one of pests with the most serious drug resistance and the most difficult control.

Emamectin benzoate (known as emamectin benzoate) as a white or pale yellow crystalline powder, soluble in acetone and methanol, slightly soluble in water, and insoluble in hexane. The pesticide is a novel high-efficiency semi-synthetic antibiotic pesticide synthesized from a fermentation product abamectin B1, and has the characteristics of super high efficiency, low toxicity (the preparation is nearly nontoxic), low residue, no public nuisance and other biological pesticides. Is widely used for preventing and controlling various pests on crops such as vegetables, fruit trees, cotton and the like. The Lufenuron ISO has the common name of Lufenuronon, and is a substituted urea high-efficiency low-toxicity insecticide developed and produced by Prohenda of original Switzerland. The insecticidal composition mainly acts on insect larvae to prevent the peeling process to kill pests, has strong egg killing and insecticidal capacity, and is mainly used for preventing and controlling lepidoptera larvae and the like of cotton, corn, vegetables, fruit trees and the like; can also be used as sanitary medicine; can also be used for preventing and controlling pests with piercing-sucking mouthparts. The 5% Emamectin benzoate-lufenuron suspending agent is a new product registered by Kangsu agriculture Limited company in Shandong for preventing and controlling diamondback moth.

The Alkyl polyglucoside (APG for short) is generally dissolved in water and is easy to dissolve in common organic solvents, has excellent compatibility, stability and surface activity in acid and alkaline solutions, can be completely biodegraded in nature, cannot form metabolites difficult to biodegrade, and thus avoids new pollution to the environment. The APG also has good hydrophilicity (HLB 10-19), can be used as an emulsifier, and has good wetting and penetrating properties.

Castor oil is fatty oil obtained by squeezing and refining mature seeds of euphorbiaceae plant Ricinus communis L, although castor oil has good permeability and moisture retention performance as oil, the castor oil is incompatible with water when directly applied and mixed with water, cannot play corresponding role, and cannot be directly added into water-based preparations.

The diamondback moth is mainly harmful to brassicaceous vegetables, and in the actual use process of the pesticide, due to the problems that the surfaces of leaves of most brassicaceous vegetables (such as cabbages and rapes) are smooth, the pesticide liquid is difficult to adhere, easy to run off, rapid to evaporate and the like, the problems that the utilization rate of the pesticide liquid is low, the pesticide effect is poor and the like are caused, and the effective control effect on the diamondback moth is reduced. The combination of emamectin benzoate and lufenuron has been patented and the related products have been put into production and no synergistic formulation using a combination of an alkyl glycoside and castor oil has been reported.

Disclosure of Invention

In order to find a synergist for preventing and treating the plutella xylostella by using a 5% Emamectin benzoate-lufenuron suspending agent, enhance the permeability of a liquid medicine, facilitate the adhesion of the liquid medicine on leaves, reduce the evaporation speed of the liquid medicine, improve the utilization rate of the liquid medicine and improve the effective prevention and treatment effect of the liquid medicine on the plutella xylostella, the invention provides a mode of using alkyl glycoside and castor oil in a mixing manner.

In order to achieve the purpose, the invention is realized by adopting the following technical scheme:

the first step, the preparation of the synergist composition containing castor oil and alkyl glycoside, the formula comprises: the castor oil injection comprises, by mass, 30-60 parts of castor oil, 10-20 parts of alkyl glycoside, 5-15 parts of castor oil polyoxyethylene ether and 5-65 parts of propylene glycol.

The processing technology comprises the following steps:

preheating castor oil and castor oil polyoxyethylene ether at the temperature of 40-50 ℃, adding the castor oil and the castor oil polyoxyethylene ether into a container in proportion for mixing, adding alkyl glycoside and propylene glycol in proportion, stirring at normal temperature for 200 revolutions per minute for 20-30 minutes until the sample is uniform, and preparing the synergist solution.

And secondly, the synergistic auxiliary agent is used in a 5% Formica Fuscaea suspending agent formula, and the formula comprises the following components in percentage by mass:

emamectin benzoate 1.0% (book Bai)

Lufenuron 4.0% (folding hundred)

Polycarboxylate dispersant 2.0%

EO/PO block polyether 1.0%

Preservative BIT 200.2%

Xanthan gum 0.2%

10-40% of castor oil and alkyl glycoside synergist

0.4 percent of defoaming agent

And supplementing deionized water to 100 percent.

Weighing deionized water, polycarboxylate dispersant, EO/PO block polyether, defoamer, preservative and xanthan gum according to a formula in proportion, adding into a container, mixing and stirring uniformly, then adding emamectin benzoate and lufenuron raw materials according to a proportion, mixing uniformly, adding into a sand mill, grinding until the detected particle size is qualified (D90 is less than 5 mu m), mixing and stirring uniformly by castor oil and an alkyl glycoside synergist according to a proportion, and preparing the synergistic 5% of a lufenuron suspending agent.

The synergist has no bioactivity, but can greatly improve the toxicity and the efficacy of the pesticide when being mixed with a certain pesticide. The alkyl glycoside and the castor oil have no biological activity to the plutella xylostella, and because the characteristics of the alkyl glycoside and the castor oil can increase the control effect after being mixed with corresponding pesticides, the alkyl glycoside and the castor oil have good synergistic effect when being combined according to a certain proportion.

Compared with the prior art, the invention has the advantages and positive effects that:

1. the advantages of the castor oil and the alkyl glycoside are complementary when the castor oil and the alkyl glycoside are mixed, the emulsifying dispersibility of the castor oil in water is improved by utilizing the water solubility and the emulsifying property of the alkyl glycoside, and the permeation performance and the moisturizing performance of the castor oil are favorably exerted.

2. The castor oil and the alkyl glycoside both have good permeability, and the castor oil and the alkyl glycoside combined synergist are added into a 5% Formica Fusca and lufenuron suspending agent formula according to a certain proportion, so that the product has excellent wetting permeability and has a good effect of improving the control effect on vegetable plutella xylostella.

3. Both castor oil and alkyl glycoside are easy to biodegrade, and the environmental pollution can not be caused by a large amount of application.

Drawings

FIG. 1 is a graph showing the results of comparative tests on moisturizing performance of synergists (synergist sample 1 is comparative example 1 in example 1, synergist sample 2 is comparative example 2 in example 1, and synergist sample 3 is the sample obtained in example 1).

FIG. 2 is a comparison test result chart of moisturizing performance before and after synergistic effect of 5% lufenuron.

Fig. 3 shows the results of the test of the wetting performance before and after the synergistic effect of 5% carbaryl and lufenuron, wherein a is the result of the control for 60 minutes with clear water, b is the result of the control for 2 minutes and 5 seconds after the synergistic effect of 5% carbaryl and lufenuron, and c is the control result of the control for 60 minutes with 5% carbaryl and lufenuron.

Detailed Description

In order that the above objects, features and advantages of the present invention may be more clearly understood, the present invention will be further described with reference to specific embodiments. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the present invention is not limited to the specific embodiments of the present disclosure.