林丹烟剂干扰下毛竹(Phyllostachys heterocycla cv.pubescens)林节肢动物群落的结构与组成

对林丹烟剂干扰下毛竹（Phyllostachys heterocycla cv.pubescens）林节肢动物群落结构与组成的系统定位观察与分析表明：长期使用林丹烟剂明显增加了群落主要物种（Pi≥0.05）的植食性种类及其优势度,显著降低群落总体的物种多样性,减少蜘蛛目、膜翅目、鞘翅目和双翅目或捕食性、寄生性和中性功能集团的物种数,削弱林冠层寄生性和捕食性物种在种类和数量上对植食性物种的制约潜能,引起叶部植食性害虫的暴发。因此,在毛竹害虫控制中应避免长期大量使用林丹烟剂。

Composition and structure of arthropod community in Phyllostachys heterocycla cv. pubescens forest disturbed by Lindane

Lindane, due to its high efficiency, low cost and easy application, has been widely and frequently used for pest control on Phyllostachys heterocycla cv. pubescens in South China in the past. Field surveys in the selected sites of the moso bamboo forest located at Saxian, Fujian Province from 2001 to 2002 indicated that indiscriminate application of Lindane caused some phytophagous species becoming predominant and abundant in the target community. The number of these arthropods increased remarkably, and at the same time, the species diversity in the community decreased significantly. Specially, species in the categories of Araneae, Hymenoptera, Coleoptera and Diptera reduced. Most of these missing species were predators, parasitoids or neutrals. Therefore, the potential impact of the herbivores' natural enemies weakened. To some extent, this might lead to outbreak of the herbivores in the bamboo leaves. Consequently, it is advisable that an integrated pest management program be implemented with only infrequent use of Lindane for pest control in the bamboo forest.