赣南松材线虫病发生特点及其与松褐天牛协同关系研究

Study on the Occurrence Characteristics of Bursaphelenchus xylophilus and Its Cooperative Relations with Monochamus alternatus in Soviet Area of Southern of Jiangxi Province

对赣南苏区松材线虫病[Bursaphelenchus xylophilus(Steiner&Buhrer)Nickle]进行了林间调查、监测及室内试验。结果表明,全市松材线虫病发生面积为326.43 hm2,病死松树有878株,平均病株率为0.117 6%,病株主要分布在老疫区章贡区及其周边的开发区、南康区和赣县;发病树种多为马尾松,发病率与树龄有关,成林松林发病显著重于幼林;每年发病时间为7~11月,8月为病树发生高峰期,11月为不明显的次高峰期,与赣南松褐天牛年发生1~2代的生活史相吻合。

By field survey and monitor and a series laboratory experiments on pine wilt disease of soviet area of southern of Jiangxi, the results show that there are 326.43 hm^2 occurrence area of pine wood nematode disease, and 878 dead infested trees, and the average incidence of the disease is 0. 117 6%. The epidemic zone expanded from Zhanggong to development zone and Nankang and Ganxian County. The massonian pine, Pinus massoniana, is the susoeptible species. Susceptibility seemed change with tree ages, that of mature trees significantly heavier than that of young trees. Dead infested trees appeared from July to November, with peaks in August and uncoo^spieuous peaks in November, and it tallied with the history and generations of long corn beetle, Monochamus alternatus, 1 to 2 generations a year, in soviet area of southern of Jiangxi.