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荆门县绝大多数蚕室养蚕条件较差,每年春蚕受蚕蝇蛆为害一般达到20—50％,从公社收购的蚕茧中,下茧要占10％,而且多数是蛆孔茧,不仅影响产茧量,更影响茧的质量。我们曾用“灭蚕蝇”片剂治疗,效果较好,但由于养蚕分散和采购药剂困难,未能普遍使用。1978年,根据乐果能防治农作物和牛的蝇类害虫的效力,我们在大蚕期用不同浓度的乐果对蚕进行了毒性试验,发现乐果对蚕的毒性较低。
Jingmen County, the vast majority of janus sericulture conditions are poor, annual silkworm by the silkworm maggot damage caused by the general 20-50% of the cocoon acquired from the commune, the next cocoon to account for 10%, and most are maggot cocoon, not only affect the production Cocoon quantity, but also affect the quality of cocoon. We have used “mum” fly tablets, the effect is better, but due to the dispersion of silkworm eggs and procurement of pharmaceutical agents, not generally used. In 1978, according to the efficacy of dimethoate against flies and pests of crops and cattle, we conducted toxicity tests on silkworms using different concentrations of dimethoate during the long silkworm period and found that dimethoate is less toxic to silkworms.