七星瓢虫(Coccinella septempunctataLinnaeus是北方小麦、棉花、花生等蚜虫的重要天敌。近年来在黄河中、下游广大地区保护利用,效果良好。麦田是七星瓢虫越冬、繁殖的主要场所,又是棉花、花生田飘源基地。七星瓢虫的发生由于受各种生态因子的综合影响,年度、地区间差异较大,影响了利用。从1977年开始,对麦田七星瓢虫 Coccinella septempunctata Linnaeus is an important natural enemy of aphids such as wheat, cotton and peanut in northern China.In recent years, the protection and utilization of broad-leaved grass in the middle and lower reaches of the Yellow River have achieved good results.The wheat field is the main site for overwintering and breeding Coccinella septempunctata, Peanut floating source base .Because of the occurrence of the ladybugs by a variety of ecological factors, the annual, regional differences, affecting the use of .Because from 1977 on wheat field ladybird