Preliminary Studies Of Forest Insect Diversity And Damage Assessment Of Forest Insect Pests In Wangqing Forestry Bureau

From April to October,2015,insect diversity were investigated in Jilin Wangqing forest,Mastered the insect species,distribution,habitats and insect occurrence period,and the important pests of Ips typographus Linnaeus damaging trees effect were evaluated.Through the investigation,for controlling forestry pests in the future,preventing the pests spread,clearing controlling emphasis,provides the basis better plan for prevention,quarantine.1.The forest insect diversity survey assessment showed that the known insects belonging to 6 orders and 48 families,197 species.Among them,odonata insects belong to seven genera and four families;Orthoptera insects belonging to four families,and six species;Mantodea insects belonging to one family one species,Hemiptera insects belonging to seven families fourteen species;Coleoptera insects belonging to seventeen families,eighty-five species;Lepidoptera insects belonging to 15 families,84 species.2.Lpidoptera and coleoptera of diversity species richness were studied.The results showed that,ones of July >ones of August >ones of May >ones of September >ones of October,the overall change present a parabolic trend.Richness index value reached the highest in June and July,October is minimal.Consistent with the nature.In Lepidoptera community structure,Noctuidae is the highest diversity index,Saturniidae evenness indexwas is the highest,the second Geometridae and Pyralidae are higher,the diversity index and evenness index of Tortricidae,Epicopeiidae,Thyatiridae and Thyrididae are zero,shows these families moths are fewer and rare.the local ecological environment are suitable for Noctuidae and Geometridae survival,feet moth division.3.According to the risk analysis index system adopts quantitative analysis and calculation results,Ips typographus L.between the risk analysis standard R = 1.89,in a moderate risk level.Pinus koraiensis Sieb.et Zucc: root pests are three species,leaf insects are six species,branches insects are five species;Larix olgensis Henry:root pests are three species,leaf insects are nine species,branches insects are six species;Pinus sylvestris var.mongolica Litv:root pests is one species,leaf insects are four species,branches insects is one species;Spruce:root pests species,leaf insects are seven species,branches insects are six species;Fir:leaf insects are three species;Quercus mongolica Fisch ex Ledeb: leaf insects are five species,branches insects is one species.4.The survey,in addition to focus on forestry pest survey,also surveyed the natural resources.