棉蚜、棉铃虫及其捕食性天敌时空生态位的研究

Studies on temporal and spatial niches of cotton aphid,cotton bollworm and their predatory enemies

摘要: 通过对棉蚜、棉铃虫及其6种捕食性天敌的时间生态位、空间生态位及时空二维生态位的研究，分析了棉蚜、棉铃虫对时间资源利用及其在群落中地位，评价了天敌之间相互关系和各种天敌对棉蚜、棉铃虫的跟随效应及控制作用。利用可变平均法对二维生态位重叠值的系统聚类分析结果表明，天敌的自然控制作用难以达到控制害虫的效果，必须协调应用多种措施综合防治。

Abstract: According to the study on the temporal niche，spatial niche and two-dimensional niche in time and space of the six predatory enemies of cotton aphid (Aphis gossypii Glover)and cotton bollworm (Heliothis armigera Huhner)，the temporal dynamics and role of these two pests played in the insect community were analyzed． The fo1owing up dynamics of predatory enemies and their impacts on these pests were evaluated．The results showed that insect pests could not be controlled if only by natural contro1． Therefore,IPM must be carried out．