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Rotenone micro-hydrogel controlled-release agent and preparation method thereof

A technology of rotenone and controlled-release agent, applied in the field of pesticides, can solve the problems of affecting the efficacy and persistence of rotenone, prone to photolysis and hydrolysis, and affecting the effect of pest control, etc., achieving strong resistance to natural environment interference, low production cost, Effects suitable for promotional applications

Inactive Publication Date: 2017-04-19
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when the rotenone preparations on the market are used in the field, rotenone is prone to photolysis and hydrolysis in the natural environment, which will affect the efficacy and persistence of rotenone, and affect the control effect on pests
In order to improve the control effect, farmers will increase the use of pesticides, making pests resistant to pesticides and affecting the ecological environment

Method used

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  • Rotenone micro-hydrogel controlled-release agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The rotenone hydrogel controlled release agent consists of the following components according to weight percentage:

[0031] Rotenone original drug 1.8%, O-carboxymethyl chitosan (CMCS) 40%, polyvinyl alcohol P-124 (PVA) 20%, emulsifier 0.3%, glutaraldehyde (GA) 0.5%. Among them: the mass content of rotenone in rotenone raw medicine is 99%, the emulsifier is sodium lauryl sulfate, calcium dodecylbenzenesulfonate, agricultural emulsifier 0201b, one or more mixtures of tea saponin agent.

[0032] Using the above rotenone hydrogel release control agent formula, the pesticide rotenone hydrogel release control agent can be prepared by chemical cross-linking method, and the specific preparation method is as follows:

[0033] Weigh 2g of polyvinyl alcohol P-124 (PVA) into a reactor, add 100ml of deionized water, heat to 90°C and stir until the PVA is completely dissolved, then cool to 60°C to obtain a polyvinyl alcohol solution. Weigh 4g of CMCS into the reactor, seal it, an...

Embodiment 2

[0035] The rotenone hydrogel controlled release agent consists of the following components according to weight percentage:

[0036] Rotenone technical 0.5%, O-carboxymethyl chitosan (CMCS) 40%, polyvinyl alcohol P-124 (PVA) 15%, emulsifier 0.3%, glutaraldehyde (GA) 0.1%, the rest is water; Among them: rotenone technical content is 60%, emulsifier is sodium lauryl sulfate, calcium dodecylbenzenesulfonate, calcium dodecylbenzenesulfonate, agricultural emulsifier 0201b, one of tea saponin or a mixture of several.

[0037] Using the above rotenone hydrogel release control agent formula, the pesticide rotenone hydrogel release control agent can be prepared by chemical cross-linking method, and the specific preparation method is as follows:

[0038] Weigh 1.5g of polyvinyl alcohol P-124 (PVA) into a reactor, add 100ml of deionized water, heat to 90°C and stir until the PVA is completely dissolved, then cool to 60°C to obtain a polyvinyl alcohol solution. Weigh 4g of CMCS into the ...

Embodiment 3

[0040] The rotenone hydrogel controlled release agent consists of the following components according to weight percentage:

[0041] Rotenone technical 0.03%, O-carboxymethyl chitosan (CMCS) 10%, polyvinyl alcohol P-124 (PVA) 20%, emulsifier 0.5%, glutaraldehyde (GA) 0.5%, the rest is water; Among them: rotenone technical content is 10%, emulsifier is sodium lauryl sulfate, calcium dodecylbenzenesulfonate, calcium dodecylbenzenesulfonate, agricultural emulsifier 0201b, one of tea saponin or a mixture of several.

[0042] Using the above rotenone hydrogel release control agent formula, the pesticide rotenone hydrogel release control agent can be prepared by chemical cross-linking method, and the specific preparation method is as follows:

[0043] Weigh 2g of polyvinyl alcohol P-124 (PVA) into a reactor, add 100ml of deionized water, heat to 90°C and stir until the PVA is completely dissolved, then cool to 60°C to obtain a polyvinyl alcohol solution. Weigh 1g of CMCS into the r...

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Abstract

The invention provides a rotenone micro-hydrogel controlled-release agent which is composed of, by weight, 0.03-1.8% of an active compound of rotenone, 10-40% of O-carboxymethyl chitosan, 10-20% of polyvinyl alcohol P-124, 0.1-0.5% of glutaraldehyde, and 0.1-0.5% of an emulsifier. The mass content of rotenone in the active compound is 10-99%. The rotenone micro-hydrogel controlled-release agent has strong capability of environment interference resistance, has long lasting time, good stability and insect prevention effect, is simple in preparation process and is low in production cost.

Description

technical field [0001] The invention relates to the technical field of pesticides, in particular to a hydrogel controlled-release agent with rotenone as the main active ingredient. [0002] technical background [0003] Rotenone, also known as rotenone, is an insecticidal active substance extracted from plants of the genus Roten, which can inhibit nerve block. It has high activity and wide insecticidal spectrum. One of the pesticides. As a typical representative of botanical pesticides, rotenone has the characteristics of broad insecticidal spectrum, not easy to produce drug resistance, easy to oxidize and decompose, has few residues in the field, short residual effect period and does not pollute the environment. It has control effects on many kinds of pests, especially against aphids, cabbage butterfly, citrus spider mites, mites and other pests. showed a significant control effect. Rotenone is a strong contact insecticide with gastric poisoning effect, and it also has gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N43/90A01N25/04A01P7/04
CPCA01N25/04A01N43/90A01N2300/00
Inventor 张志祥黄日林徐汉虹李梓豪
Owner SOUTH CHINA AGRI UNIV
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