松材线虫病新疫点成因机制初探

Cause of pine wilt disease infecting healthy pine forest

采用逻辑流程图, 结合人为诱发和松墨天牛形体特征及新疫点发生实况分析, 结果表明, 松材线虫病新疫点有人为传播、火灾诱发、原发生未防治和自然传播四大成因机制。松墨天牛能随气流大范围扩散是新疫点的最重要的成因机制, 必须引起防治工作者的高度重视。图1

Applying logical flow chart to the discussion of causes of pine wilt disease infecting healthy pine forest,integrating with artificial provocation experiments in the new epidemic spots of pine wilt disease in Ningbo City of Zhejiang Province,and coming to the conclusion that man caused dissemination,fire induction,non control and natural dissemination are four causes leading new epidemic spots.Among which wind is a key factor that is advantageous to the diffusion of Monochamus alternatus.Healthy pine forests are infected by pine wilt disease in the east part of Beilun District where is a long way from the infected pine forests over 4 5 km.