Application of DMNT in preparation of lepidoptera pest insecticide

Abstract

The invention relates to an application of DMNT in preparation of a lepidoptera pest insecticide, which belongs to the technical field of pesticide preparation. DMNT is a natural secondary metaboliteof plants and has no damage to the plants. The prior art shows that DMNT has volatility and can attract natural enemies of pests to prey the pests. According to the invention, the DMNT is found to have a poisoning effect on three lepidoptera pests including plutella xylostella, ostrinia nubilalis and grassland spodoptera litura for the first time, the pupation rate and eclosion rate of the pests can be remarkably reduced, and the propagation quantity of the pests is reduced. The substance is easy to volatilize and metabolize and does not pollute soil and a water source, so that development ofa novel efficient pollution-free natural insecticide by taking the substance as a research object has important significance on prevention and control of crop pests.

Description

technical field [0001] The invention belongs to the technical field of pesticide manufacture, and in particular relates to the application of DMNT in the preparation of insecticides for lepidopteran pests. Background technique [0002] The common crops of cruciferous crops include various vegetables such as oilseed rape and cabbage, and the main pest is diamondback moth (plutella xylostella, PX). Plutella xylostella, also known as hanging silkworm, is one of the main pests of Lepidoptera. The first instar larvae eat leaves and form holes and nicks. When they grow into the third instar, their feeding ability is greatly enhanced. The fourth instar larvae enter the gluttony period and can The parasitic plant leaves are eaten into a web. Plutella xylostella has a short life cycle, fast reproduction speed, and strong adaptability to the environment. It can cause pest outbreaks in a short period of time and seriously endanger the growth of economic crops. [0003] Corn borer (as...

AI Technical Summary

Problems solved by technology

The gnawing ability of the larvae in the late fourth instar is greatly enhanced, and they move from the heart leaf to the outside of the plant. They mainly eat corn stalks and leaves. Farmers inflict heavy economic losses

However, most of the existing insecticides on the market are organophosphorus chemical reagents, which have the following disadvantages: (1) strong and unpleasant smell, which can cause respiratory damage to the sprayer if the sprayer inhales it, and skin damage caused by accidental contamination of the skin with the agent

(2) Pesticide residues seriously pollute water resources and soil environment, and it is difficult to degrade completely within a few years

(3) People and animals eat the fruits or leaves sprayed with such pesticides by mistake, which will cause serious harm

(4) Pests are prone to develop resistance

[0007] Iron compound 4,8-dimethyl-1,3,7-nonatriene (4,8-dimethyl-1,3,7-nonatriene), molecular formula C 11 h 18 , with a relative molecular weight of 150.2606, referred to as DMNT, is a natural plant secondary metabolite. This compound can be used as an inducer to induce natural enemies of pests to hunt and kill insects, or to induce plants to produce proteins that cannot be digested by pests. However, there is no literature report that DMNT has The effect of directly poisoning insects

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