Batocera horsfieldi,a forestry pest,was an important stem-borer in *** Pest Risk Analysis(PRA) of *** was evaluated in order to providing more information to prevent the further spreading and intergreted control of th...
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Batocera horsfieldi,a forestry pest,was an important stem-borer in *** Pest Risk Analysis(PRA) of *** was evaluated in order to providing more information to prevent the further spreading and intergreted control of this *** to the methods of international PRA,the risk level of *** was estimated by qualitative and quantitative analysis,and its control countermeasure was *** results of qualitative analysis showed that *** had lots of hosts,and its wide distribution,high adaptability and the difficulty of eradication made the pest damages forestry production *** to the quantitative analysis,the PRA value of the pest was 2.04,showing that it was one of the high perilous forestry pests in *** and various control measures must be strengthened to prevent the spreading and damage of *** were given that *** would be controlled sustainably by releasing Dastarcus helophoroides,a natural enemy of ***,in damaged forests.
One virus of Diprion nanhuaensis was separated from the died D. nanhuaensis, the virus belongs to nuclear polyhedrosis virus, bacilliform virus particle in inclusion body appears SNPV(single nucleocapsid polyhedrosis ...
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One virus of Diprion nanhuaensis was separated from the died D. nanhuaensis, the virus belongs to nuclear polyhedrosis virus, bacilliform virus particle in inclusion body appears SNPV(single nucleocapsid polyhedrosis virus) by electron microscopy. The structure of inclusion body appears polyhedron and close to rotundity, and the length of diameter of inclusion body ranges 0.5～1.0 μm, a little proportion of them shows anomalistic form. There are many bacilliform virus particles in one inclusion body. Six virus particles in one inclusion body take up a large proportion and one virus particle in one inclusion body only takes up a small proportion, the length of virus particle ranges 125～200 nm,and the length of diameter of virus particle ranges 25～30 nm. Meanwhile,the virus can infect the 2～3 instars Neodiprion xiangyunicus and the 2～3 instars D. nanhuaensis in laboratory.
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