Investigation And Risk Assessment Of Forest Pest In Three Cities Of Shandong Province

Taking Jiaozhou City of Qingdao, Linzi District of Zibo, Guangrao County of Dongying these three regions in Shandong Province for example, for the regional forest, protection forest, timber forest, economic forest, green trees, wood and its products production and business premises and others to investigate, we can clear and definite the species, distribution and harm situation of forest pest in these three cities ((Jiaozhou City, Linzi District, Guangrao County) in Shandong Province.Through systematic investigation and analysis, this study found and identified 270 kinds of forest pests (141 species of pests,127 species of diseases, harmful to plants and 2). According to statistics, there are 110 kinds of forestry pest in Jiaozhou City, including 69 kinds of insect pests (7 orders,33 families,62 genera and 69species),41 kinds of diseases. There are 179 kinds of forest pests in Linzi District, including 103 kinds of insect pests (8 orders,46 families,95 genera and 103 species),74 kinds of diseases,2 kinds of harmful plants. There are 91 kinds of forest pests in Guangrao County, including 41 species (4 orders, 25 families,41 genera and 41 species),49 kinds of diseases and 1 kinds of harmful plants. Through access to the first and second national forest pest census data, comparing The Forest Diseases and Insect Pests Census in China, published in 1988 with The National Forest Pest Census Results Compilation from 2003 to 2007, published in 2008, we sorted out that there is no record in Shandong area in the first and second national forest census records. This survey found that there are 26 kinds of forest pests. In addition, three cities (Jiaozhou City, Linzi District, Guangrao County) in Shandong are found that there is one kind of national forestry quarantine pest and 33 kinds of national dangerous forest pests, including 25 kinds of insect pests,7 kinds of diseases and 1 kinds of harmful plants.Based on the survey of species, the harm degree and regional distribution of major forest pests in different regions were defined, and the trend of occurrence of forest pests and diseases in three areas was analyzed.Found in the actual survey, the damage of trunk pest in Linzi area and Guangrao area is particularly serious. This paper did risk analysis for Holcocerus insularis Staudinger which was serious damage among the trunk pest in these two areas. The results show Holcocerus insularis Staudinger risk index for R=1.92 and is assessed moderate risk forest pests.According to the survey results, this paper analyzes the occurrence status quo, cause, harmful characteristics and potential risks of the forest pest in Jiaozhou City, Linzi District and Guangrao County, and puts forward the prevention and cure strategy from the macro.