A kind of biological control method for effectively controlling pine wood nematode disease in monochamus

Abstract

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. The method for effectively controlling pine wood nematode disease by the biological control of Monochamus alternata described in the present invention is to apply Cornus officinalis extract in pine trees containing Monochamus larvae before the pupation of Monochamus alternata at the end of April and the beginning of May each year The method of / morroniside can effectively block the pupation of monochamus alternatus, stop the development of monochamus larvae, reduce the population density of pine xylophilus pupae and adults, and then reduce the mortality of pine trees. At the same time, it also effectively prevents Subsequent pine wood nematodes formed a diffuse fourth-instar nematode with the eclosion of Monochamus alternatus, which effectively blocked the spread of pine wood nematodes, thereby reducing the mortality rate and spread speed of pine trees in areas where pine wood nematodes occurred, and preventing the spread of pine wood nematodes in forests. The prevention and control goal of further spread and expansion in the region can solve the problem of large-scale reproduction and rapid spread of pine wood nematode in the place where the pine wood nematode epidemic occurs.

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 wood 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

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