A kind of botanical insecticide and its preparation method and application

Abstract

The invention discloses a plant source insecticide and a preparation method and application thereof. The plant source pesticide includes isolariciresinol and is suitable for killing plutella xylostella or cabbage caterpillar; the main effective component, namely isolariciresinol, of the insecticide abounds in the nature, particularly the content of isolariciresinol in plants is relatively high, and isolariciresinol is low in toxicity, easy to degrade, and safe to environment; an isolariciresinol extraction method is simple, and isolariciresinol can be extracted through an ion exchange resin process or supercritical CO2 extraction process or other processes; isolariciresinol also can be synthesized artificially, the process is simple, the cost is low, and large-scale industrialized production is easily achieved; due to the physical and chemical characteristics of isolariciresinol, isolariciresinol can be dissolved in many organic solvents, is easily mixed with other insecticidal constituents to prepare insecticides, and can play a role in improving the insecticidal effect.

Description

technical field [0001] The present invention relates to a botanical pesticide, in particular to a botanical pesticide and its preparation method and application. Background technique [0002] Pesticides are medicines used to control agricultural pests and urban sanitation pests. Due to the development of agriculture and the exponential increase in the demand for food due to the increase in human population, the use of pesticides is very common. However, almost all pesticides will seriously damage the Most of the changes in the ecosystem are harmful to humans, and the rest will be concentrated in the food chain. [0003] In fact, there are about 1,000 kinds of plants in the world that are more or less virulent to insects. Pyrethrum, deer vine and tobacco are widely used. In addition, some plants also contain active substances similar to juvenile hormone, precocious hormone, and ecdysone. For example, camptothecin isolated from the root bark, bark or fruit of camptothecin h...

AI Technical Summary

Problems solved by technology

[0005] 1. Most natural product compounds have complex structures, are difficult to synthesize or the synthesis cost is too high, and are not easy to produce on a large scale;

[0006] 2. The active ingredients are easy to decompose, and the ingredients of the preparation are complex and difficult to standardize;

[0007] 3. Most botanical pesticides are slow to exert their efficacy, which leads some farmers to think that the pesticides used are ineffective;

[0008] 4. The number of spraying is too many, and the residual effect period is short, which is not easy for farmers to accept;

[0009] 5. Due to the regional distribution of plants, there are many limiting factors in the selection of processing sites and the collection of plants is seasonal, etc.

The role of isolariresinol in medicine has been studied by researchers. For example, in the patent CN1704066A "Pharmaceutical Use of Isolariresinol", isolariresinol is used to treat endotoxemia and reduce the induced Among the drugs that caused death due to multiple organ failure, but there is no report on the application of isolaciresinol in the preparation of botanical insecticides in the existing literature

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