毛竹黑叶蜂的发生与环境因子关系的研究

为了探讨毛竹黑叶蜂（Eutomostethus nigritus Xiao）的发生危害与环境因子的关系,掌握其林间种群数量的变动特点,对该虫的发生与环境关系进行持续2年的调查研究,研究结果表明毛竹黑叶蜂在毛竹纯林中发生危害较为严重,而在竹杉、竹阔混交林中发生较轻。毛竹黑叶蜂的发生危害与不同竹林结构、不同立竹量有一定关系,在立竹量高、竹林结构合理、新竹多的林分发生较为严重。该虫在海拔高度600 m以下的竹林发生危害比较严重,在阳坡发生危害重于阴坡,中、下坡位的发生危害重于上坡。

Studies on the Relationship between the Occurrence of Eutomostethus nigritus Xiao and the Environmental Factors

The results indicated that the occurrence of Eutomostethus nigritus Xiao was more serious in the pure bamboo stand, but less damages in the mixed bamboo cedar forest and in the mixed bamboo hardwood forest. Because the stand structure and the bamboo quantity have effects on the occurrence of Eutomostethus nigritus Xiao, so it occured more seriously in bamboo forest with high bamboo quantity, reasonable stand structure and many underyearlings. The insect was more seriously occured in bamboo stand at below 600 metres than that above 600 metres, heavier on sunny-slopes than on shady-slopes, and lighter on upslopes than on midslopes and downslopes.