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A method for preparing I. javanica microcapsule suspension

A technology of I. clavulatus and suspension agent, which is applied in the field of preparation of I. japonicus microcapsule suspension by complex coacervation method, can solve the problems of large amount of bacteria powder, low content of active ingredients, difficulty in transportation and storage, etc., and improve utilization rate, reduce the number of uses, and prolong the effect of the effective period

Active Publication Date: 2021-05-04
PLANT PROTECTION RES INST OF GUANGDONG ACADEMY OF AGRI SCI
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Its active ingredient content is low and its volume is large, which brings great difficulties to transportation and storage. In addition, the amount of bacterial powder used is large, the adhesion is not good, and the control effect is very unstable.

Method used

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  • A method for preparing I. javanica microcapsule suspension
  • A method for preparing I. javanica microcapsule suspension

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 3

[0028] 3. Example 3: 5% Isera javanica microcapsules

[0029] Add 5 g of I. japonicus, 1.0 g of alkylphenol polyoxyethylene ether formaldehyde condensate, 2.0 g of polyoxyethylene polyoxypropylene ether block copolymer, and 2.0 g of dioctyl sulfosuccinate sodium salt into soybean oil Stir in medium to form an oil solution, then add a gelatin aqueous solution with a mass fraction of 3% to make a drug-containing solution, adjust the pH to 4 with acetic acid; slowly drop in an aqueous solution containing 8.0 g of gum arabic under stirring at 500 r / min, and re-coagulate for 20 minutes Then, 3 g of propylene glycol was added to the reaction liquid, and crosslinked for 1 hour. Finally, add 0.05 g of xanthan gum and 0.1 g of higher alcohol fatty acid ester complex at room temperature, make up to 100% with deionized water, and cut at 2000 r / min for 30 min.

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Abstract

The invention relates to the technical field of production and processing of biological pesticide preparations, and is a suspension of microcapsules of Corynebacteria javanica prepared by a complex coacervation method. The invention uses two oppositely charged wall materials as embedding materials, and core materials are dispersed therein. Afterwards, by changing the pH value, temperature or concentration of the aqueous solution, the two wall materials interact to form a complex, resulting in a decrease in solubility and coagulation and precipitation to form microcapsules. The mass fraction of each component is 0.1-10% of capsule wall material, 0.1-10g of Corynebacterium javanica, 40% of vegetable oil or mineral, 1-10g of cross-linking agent, 0.1-10% of wetting agent, 0.1-10% of dispersant, and 0.1-10% of dispersant. The thickening agent is 0.1-1%, and deionized water is added to 100% to obtain the microcapsule suspension of C. javanica.

Description

technical field [0001] The invention belongs to the field of pesticide production, and in particular relates to a method for preparing I. javanica microcapsule suspension by a complex coacervation method. Background technique [0002] At present, in the aspect of agricultural pest control in our country, the use of chemical insecticides to control pests is still one of the main means to increase crop yield. The extensive use of chemical pesticides has seriously polluted the environment, disrupted the ecological balance, and threatened human health. Therefore, more and more attention has been paid to environmentally friendly microbial pesticides. [0003] I. javanica is a microbial insecticide belonging to the Ascomycete class of entomogenic fungi. It is widely distributed all over the world and has a wide range of hosts. It has been recorded in 25 different families of insects, including diamondback moth, wheat aphid and tobacco Some important agricultural pests such as wh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N25/04A01N25/28A01N63/30A01P7/04
CPCA01N25/04A01N25/28A01N63/30
Inventor 章玉苹王龙江黄少华李传瑛刘伟玲廖永林朱天圣
Owner PLANT PROTECTION RES INST OF GUANGDONG ACADEMY OF AGRI SCI
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