森得保粉剂对木荷林昆虫多样性的影响

Effects of Sedebao on the Insect Community Diversity of Schima superba's Stands

在3月和4月,对用森得保粉剂防治油茶尺蛾的木荷林昆虫多样性进行了调查,结果表明:森得保粉剂虽对木荷防火林带林冠层昆虫群落多样性有一定的抑制,但其极大地降低木荷防火林带林冠层内植食性昆虫的数量,导致植食性昆虫在群落中的比例降低;而对捕食和寄生昆虫的数量影响不大,从而使捕食性和寄生性昆虫所占比例都有不同程度的上升。这对木荷防火林带林冠层昆虫群落的稳定性有一定的促进作用。

In March and April,The effects of Sedebao（Avermectin and Bt） on the insect community diversity were studied after Biston marginata was controlled with Sedebao in Schima superba＇s stands in Zhongshan City,Guangdong province of China. The results showed that although the insect community diversity in the canopy of forest firebreak belt was influenced by Sedebao after its application,the number of phytophagous insects declined sharply, and their ratio decreased in the insect community;and meanwhile, the number of insectivore did not decrease obviously, thus their ratio rised in the insect community. And that had a certain stimulative effect on the stability of the insect community in the canopy of forest firebreak belt.