研究了小麦-油菜间作和田间施用水杨酸甲酯(MeSA)下麦长管蚜及其主要天敌种群的空间分布.结果表明:小麦-油菜间作和施用MeSA使麦长管蚜的空间分布发生改变.间作和施用MeSA均能降低麦长管蚜的聚集程度,并使之趋于均匀分布,二者同时作用效果更显著.小麦不同生育期天敌种群空间分布的变化趋势与麦长管蚜种群基本一致.研究结果可为确立麦长管蚜及其天敌的田间调查抽样方法和预测预报等提供依据. The spatial distribution of wheat aphids and their main natural enemies under intercropping and field application of wheat-rapeseed (Brassica napus L.) was studied.The results showed that the spatial distribution of wheat aphid Change.The intercropping and application of MeSA can reduce the aggregation degree of Aphis gossypii and make it tend to distribute evenly.The effect of the two is more significant at the same time.The trend of spatial distribution of the natural enemies at different growth stages is similar to that of the Aphis gossypii Basically consistent.The results provide the basis for establishing field sampling methods and forecasting of wheat aphid and their natural enemies.