A kind of biological control method of eucalyptus looper pupal stage

Abstract

The invention belongs to the technical field of agricultural insect pest control, and specifically relates to a biological control method for the pupal stage of the eucalyptus inchworm, which comprises the following steps: spreading metarhizium anisopliae granules during the pupation stage of the eucalyptus inchworms, the metarhizium anisopliae granules comprising: Metarhizium anisopliae spore powder and nutrients that provide nutrition for Metarhizium anisopliae. The beneficial effects of the present invention are: in the prevention and treatment method of the eucalyptus inchworm pupa stage, Metarhizium anisopliae has strong pathogenicity to Eucalyptus inchworm pupae, and the control effect is good; meanwhile, Metarhizium anisopliae is environmentally friendly, non-toxic and has no residue, and the Metarhizium anisopliae granules The agent contains nutrients, which can realize the continuous proliferation of Metarhizium anisopliae in the environment, maintain the amount of bacteria in the soil, and achieve the purpose of continuous pest control.

Description

technical field [0001] The invention belongs to the technical field of agricultural insect pest control, and in particular relates to a biological control method for the pupal stage of the eucalyptus inchworm. Background technique [0002] The eucalyptus inchworm is the most serious damage to the fast-growing eucalyptus forest and has the largest occurrence area of ​​leaf-eating pests. It includes several species such as the eucalyptus eagle inchworm, the eagle inchworm, the dust inchworm, and the hook-winged inchworm. Sometimes several kinds of inchworms are mixed. It occurs widely in planting areas, and even hundreds of hectares are contiguous in some areas. In severe cases, the population density of each plant can reach thousands of insects, which can eat up the whole eucalyptus leaves, seriously affecting the photosynthesis and fast growth and high yield of trees. , causing great economic losses. In terms of production prevention and control, organic phosphorus, pyrethr...

AI Technical Summary

Problems solved by technology

[0002] The eucalyptus inchworm is the most serious damage to the fast-growing eucalyptus forest and has the largest occurrence area of ​​leaf-eating pests. It includes several species such as the eucalyptus eagle inchworm, the eagle inchworm, the dust inchworm, and the hook-winged inchworm. Sometimes several kinds of inchworms are mixed. It occurs widely in planting areas, and even hundreds of hectares are contiguous in some areas. In severe cases, the population density of each plant can reach thousands of insects, which can eat up the whole eucalyptus leaves, seriously affecting the photosynthesis and fast growth and high yield of trees. , causing great economic losses

In terms of production prevention and control, organic phosphorus, pyrethroids and other chemical agents are used for emergency prevention and control when the forest trees have obvious damage symptoms in the late stage of the outbreak of the inchworm. It is not only difficult to recover the losses that have been caused, but also easily causes environmental pollution and drug resistance

[0003] In terms of biological control of eucalyptus inchworm, there are many studies on the use of nuclear polyhedrosis virus to control this insect, but its application is limited due to the need to use living organisms for propagation of the virus.

Our previous studies have proved that Metarhizium anisopliae has strong pathogenicity to eucalyptus inchworm larvae, but there is no research on the use of Metarhizium anisopliae to control Eucalyptus inchworm pupal stage. Therefore, based on the previous research, we proposed Study on Biological Control of Eucalyptus Pupal Stage Using Metarhizium anisopliae

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