Method for preparing agent for preventing and treating red spider of Chinese chestnut using extracts from walnut green husk

Abstract

The invention relates to a method which uses walnut green husk extractive to prepare medicine curing Chinese chestnut red spider. The method has the steps as follow: walnut green husk is taken and washed, and then is crushed in a juice extractor; the crushed green hush juice is poured into a container and is added with ethanol for well stirring; after the mixture is leached for 10-14 hours, solution is filtered with a filter cloth, liquid is pressed and concentrated by a rotary evaporators to remove ethanol and moisture, then the solid walnut green husk extractive is obtained; ethanol, emulsifier and osmotic agent are added to the solid walnut green hush extractive, and distilled water is again added to dilute the solid walnut green hush extractive; the walnut green husk extractive medicine is obtained. The invention provides a method which takes walnut husk as main raw materials to prepare medicine curing Chinese chestnut red spider. Walnut is one of four dried fruits in the world and planting area is extensive, resources are abundant. The method which uses the ethanol to directly leach is simple, is prone to systemic factory production. The additive medical medicine is less. The extractive of walnut is safe to human and animals, has good anti-mite effective and does not harm trees.

Description

technical field [0001] The invention relates to a method for preparing a medicament for preventing and controlling tree diseases and insect pests, in particular to a method for preparing a medicament for preventing and controlling chestnut spider mite by using walnut green bark extract. Background technique [0002] Chestnut red spider, also known as Acerola mite, Chestnut mite, belongs to Arachnida, Acaridae, Tetranychuidea, Tetranychidae. Distributed in my country's Beijing, Hebei, Shandong, Jiangsu, Anhui, Zhejiang, Jiangxi and other provinces, cities and many countries in the world. The hosts include tree species such as chestnut, chestnut, oak, spruce, fir, and oak, and are the main pest mites that damage chestnut leaves. Acerola mite sucks leaves with juveniles, nymphs and adults. Chestnut leaves are damaged with small pale spots, especially concentrated on both sides of the veins. In severe cases, the leaves are pale yellow, scorched and dead, the tree is weak, and ...

AI Technical Summary

Problems solved by technology

In addition, the continuous use of a single high-efficiency agent makes it easy for harmful mites to develop resistance to conventional acaricides

At present, there are very few varieties of conventional acaricides on the market that are not easy to develop resistance to harmful mites. However, these agents have high chemical components. Although they can kill insects, they will also affect trees themselves and humans and animals.