摘要
通过浙江省余杭县长乐林场1966—1978年和缙云县1972—1974年马尾松毛虫一次发生全过程的调查表明,在自然状态下,马尾松毛虫每隔3—4a大发生一次,大约相隔5—9个世代;大发生多在第一代,其次是越冬代;马尾松毛虫危害特点是“蚕食—嵌镶—联片发生。依据马尾松毛虫数量变动特点,把常灾区松林分为四种类型:渐进发生型、爆发发生型、扩散发生型和低密度稳定发生型。根据发生特点和发生类型,可相应采取生物防治和化学防治措施。
Researches had been carried on the total process of violent occurrence of Masson-pine caterpiller which took place at the Changle Forest Farm of Yu hang county in 1966—1978 and Jinyun county in 1972—1974 in Zhejiang province. The results show that Masson-pine caterpiller violent occured every three or four years under natural condition, and after an interval of 5—9 generations. The occurrence usually takes place in the first generation and secondary in overwintering generation. The character of the harmfulness is that takes in nibbling-mosaic-joining together. Four types of forests in disaster area can be divided according to the characteristics of the Massonpine caterpiller changing in quantity, such as gradually advancing occurrence type, explosive occurrence type, spreading occurrence type and the type of stable occurrence in low densiW. In the end, biological and chemical prevention and control methods have been presented according to the characters and the type of the Masson-pine caterpiiler occurrence.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
1991年第3期7-12,共6页
Journal of Northeast Forestry University
关键词
马尾松
松毛虫
发生类型
Masson pine
Masson-pine caterpiller
Occurrence type
