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Method for preparing Isaria javanicus microcapsule suspension

A technology of microcapsule suspension agent and coryneform spores, which is applied in the fields of botanical equipment and methods, pesticides, biocides, etc. The effect of reducing the number of times of use, increasing the utilization rate, and prolonging the validity period

Active Publication Date: 2017-09-15
PLANT PROTECTION RES INST OF GUANGDONG ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • 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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  • Method for preparing Isaria javanicus microcapsule suspension
  • Method for preparing Isaria javanicus microcapsule suspension

Examples

Experimental program
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Effect test

Embodiment 2

[0027] 2. Example 2: 3% Isera javanica microcapsule suspension

[0028] Add 3.0 g of I. javanica to an acetic acid solution with a mass fraction of 0.6% chitosan (the mass fraction of acetic acid is 1%) to make a drug-containing solution. Under stirring at 45°C, mix with an emulsifier (polyoxyethylene 3.0 g of sorbitan fatty acid ketone, 1.0 g of sorbitan ester, and 1.0 g of fatty alcohol polyoxyethylene ether) were mixed with peanut oil at a mass ratio of 1:1.5 to prepare an emulsion. Slowly drop 20 g of sodium lignosulfonate solution containing 6.0 g under stirring, and after 20 min of recoagulation time, add 4 g of glutaraldehyde to the reaction solution, and crosslink for 1 hour. Finally, add 3.0g of alkylphenol polyoxyethylene ether formaldehyde condensate, 0.05 xanthan gum, 0.1g of polyether modified silicon emulsified silicone oil at room temperature, make up to 100% with deionized water, 6000r / min, and cut for 15min .

Embodiment 3

[0029] 3. Example 3: 5% Isera javanica microcapsules

[0030] 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 oily liquid, then add a gelatin aqueous solution with a mass fraction of 3% to make a medicinal liquid, 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 the resetting time After 20 min, 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 processing of biological pesticide preparations, and concretely relates to an Isaria javanicus microcapsule suspension prepared through a complex coacervation method. Two oppositely-charged wall material substances are used as an embedding material, a core material is dispersed in the embedding material, and the pH value, the temperature or the aqueous solution concentration of the obtained system are changed to interact the two wall materials in order to form a compound, so the solubility decreases, and the system coagulates and precipitates to form microcapsules. The Isaria javanicus microcapsule suspension comprises, by mass, 0.1-10% of the capsule wall material, 0.1-10 g of Isaria javanicus, 40% of plant oil or mineral oil, 1-10 g of a cross-linking agent, 0.1-10% of a wetting agent, 0.1-10% of a dispersant, 0.1-1% of a thickener, and the balance of deionized water.

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 Applications(China)
IPC IPC(8): A01N25/04A01N25/28A01N63/04A01P7/04
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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