Method for effectively controlling pine wilt disease by biological control of Monochamus alternatus hope

Abstract

The invention belongs to the technical field of agricultural pest control, and particularly relates to a method for effectively controlling pine wilt disease by biological control of Monochamus alternatus hope. According to the method, before Monochamus alternatus pupation starts at the end of April and the beginning of May every year, a dogwood extract / morroniside is applied to pine trees containing Monochamus alternatus larvae so that pupation of Monochamus alternatus hope can be effectively blocked, the development of Monochamus alternatus larvae is stopped; the population density of pine wood nematode pupae and adults is reduced; furthermore, the death rate of pine trees is reduced, meanwhile, subsequent pine wood nematodes are effectively prevented from forming diffusion type four-instar nematodes along with eclosion of Monochamus alternates hope; diffusion and propagation of pine wood nematodes are effectively blocked, so that the death rate and the diffusion and propagation speed of pine trees in a pine wood nematode occurrence area are reduced, the prevention and control target of further propagation and expansion in a forest area is achieved, and the problems of mass propagation and rapid diffusion of pine wood nematodes in a pine wood nematode epidemic situation occurrence place can be solved.

Description

technical field [0001] The invention belongs to the technical field of agricultural pest control, and in particular relates to a biological control method for effectively controlling pine wood nematode disease by biological control of monochamus. Background technique [0002] Pine wood nematode disease, known as the "cancer" of pine trees, is the most dangerous forest disease in the world. The characteristic is that pine trees can die within 40 days at the fastest after being infected with pine wilt nematode, and pine forests can be destroyed within 3-5 years after being infected with the disease, which poses a major threat to the ecological environment construction dominated by forestry in my country. The destructiveness of pine wood nematode disease lies in: strong pathogenicity, fast host death; fast spread, and often caught off guard; once it occurs, it is difficult to control. It not only causes huge losses to the national economy, but also destroys the natural landscap...

AI Technical Summary

Problems solved by technology

[0003] Although pine xylophilus is a serious hazard, it has a fatal weakness - it cannot spread by itself, and must rely on vector insects such as the pine wood nematode to spread and spread

However, because the pine beetle usually lives under the bark and xylem of pine trees, eats and harms, and its lifestyle is very hidden, it is very difficult to prevent and control in conventional ways