Forestry Insect Community Investigation And Risk Analysis Of Main Forestry Pests In Nanhu District Jiaxing City

Insect diversity investigation of Nanhu district Jiaxing city in Zhejiang province was carried onduring2010-2011. Forest pest community structure and the main trunk pests were systematicallysurvey and analyzed. The results are as follows:1. According to the survey and references,9,928specimens were recorded, belonging to10orders,67families. The number of Homoptera, Lepidoptera and Coleoptera, which were the dominantgroups, accounted for86%of the total number of family, genera and species quantity. Diversity index(H′), richness index (Dm), evenness index (J′) and dominance index (D) were used to study thediversity of5representative habitats. The results show that the stability,uniformity and richness ofinsect communities in Nanhu district Jiaxing city was poor, but the intensity of insects was high.2. In all these specimens,there are8524pest specimens, belonging to7orders,59families and182genera216species. The risk analysis was made on both Anoplophora glabripennis Motschulskyand Anoplophora chinensis Forster which were the most serious trunk pests. The results show that riskindex value (R-value) of Anoplophora glabripennis Motschulsky was1.95, between2.0~1.5, assessedto be moderate risk pest of forest in Nanhu district, and the R-value of Anoplophora chinensis Forsterwas2.05, assessed to be high risk pest of forest in Nanhu district.3. According to the study, some advices about management strategy and some specific controlmeasures to longicorn beetles were given.