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桑树栽培多是以提供家蚕食料为目的。因此,生物防治在桑园中比其它作物更为重要。根据本人1986—1987年的杭州等地区调查,在桑园害虫捕食性天敌主要是蜘蛛、草岭和瓢虫。蜘蛛占50％,不仅数量多而且持续时间长,控制害虫的消长作用也最明显。 每亩蛛量可达到1万头以上,至少有12科45种。优势种是常在枝叶上活动的微蛛科的草间小黑蛛和多在地面活动的各种狼蛛和水狼蛛,发生数量占全部蜘蛛量的80％以上。对食性和食量考察中发现,草间小黑蛛可以取食桑瘿蚊、桑叶蝉的成虫以及桑尺蠖
Mulberry cultivation is to provide more silkworm food for the purpose. Therefore, biological control is more important in mulberry than any other crop. According to my survey of Hangzhou and other regions from 1986 to 1987, the predatory natural enemies in mulberry fields are mainly spiders, Caoling and ladybugs. Spiders accounted for 50%, not only in quantity but also for a long time, the role of pest control the most obvious growth and decline. Each acre can reach 10,000 or more, at least 12 families and 45 species. The predominant species are the common small black-legged spider mites living on branches and leaves and all kinds of tarantulas and wolves active on the ground, accounting for more than 80% of the total number of spiders. On the diet and food intake found that black grass spider mites can feed mulberry mosquitoes, mulberry adult and mulberry mullet