STUDY ON THE IPC OF LARCH BARK BEETLE
Yu Chengming (Northeast Forestry University) Zhang Qinghe (Forest plant Quarantine and Pest Control Institute of Forestry Ministry) Wu Xiangde Liang Xiaodong Shun Baoren (Control and Quarantine Station of Forestry Pests and Diseases of Huanan County, Heilongjiang Province) Zhang Zhongshan (Mengjiagang Forest Farm of Heilongjiang Province)
Larch bark beetle (Ips subelongatus) produces two or three generations a year in Huanan county of Heilongjiang province.There are three flying and attacking host periods with emphases aggregation phenomena of the population in this area during the year. The outbreak law of this pest is a vicious circle process ,which it spreads to weakly trees from fallen trees, and then attacks the healthy trees because of integrate effects of all factors destroying the growth of tree, unsuitable natural condition,climatic factors and man activity.The outbreak forest sites were divided into two types,fast and slow types according to the pest occurence characters, meanwhile ,the mechanism of forming outbreak forest sites and relative techniques for forecast and IPC were presented.The IPC for 2000 ha outbreak Forest sites have been got successfully in Menjiagang forest farm from 1984 to 1986.The result of IPC shows that the injured rate of forests was reduced from 30%—65% to 1%.In the end ,a program diagram of IPC of larch bark beetle occured in larch plantation was presented.
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.