一九七五年我们在嘉定县马陆公社开门办学,对棉红蜘蛛的天敌进行了初步调查。发现棉红蜘蛛的天敌主要有深点食螨瓢虫、中华草蛤、六点蓟马、小花蝽等四种,而在八、九月份棉红蜘蛛高峰季节,尤以深点食螨瓢虫最多。同时在嘉定县长征公社以及上海县、南汇县等地棉田及草地上也多有发现。深点食螨瓢虫的生活史在八月底到九月底一个月时间内,我们 In 1975, we started our school in Malu Commune, Jiading County and conducted a preliminary investigation of natural enemies of cotton spider mites. Found that cotton spider mite predators are deep point mites ladybugs, Chinese grass flies, six o’clock thrips, small bugs and other four, and in August and September peak season of cotton spider mite, especially deep mites ladybugs . At the same time in Jiading County Changzheng commune and Shanghai, Nanhui County, cotton fields and grassland are also many found. Deep-seated mites ladybug life history from the end of August to the end of September within a month’s time, we