七星瓢虫Coccinella septempunctata Linnaeus是鲁西北地区小麦、棉花、花生蚜虫的主要天敌。1974年以来,我区大面积利用其防治棉蚜,取得显著成效。但其发生规律尚不够清楚,因而影响了进一步的利用。我们于1978～1980年对七星瓢虫在鲁西北地区的发生规律进行了初步调查,现将结果报告如下。 Coccinella septempunctata Linnaeus is the main natural enemy of wheat, cotton and peanut aphids in the northwestern Shandong Province. Since 1974, our area has made great use of its control of cotton aphid and achieved remarkable results. However, its law of occurrence is not yet clear enough, thus affecting further utilization. We conducted a preliminary investigation of the occurrence of ladybird ladybird in northwestern Shandong from 1978 to 1980. The results are reported as follows.