红蜘蛛对蚕种生产的危害及防治措施

本调查了用红蜘蛛危害叶饲养原蚕的茧质、死笼率及产卵质量，与对照缃比：全茧量下降１６％～１８％，茧层量下降２０％～２３％，死笼率增加６％左右，产卵量明显减少，减少２０％～２４％，不受精卵率增加。并分析了今春红蜘蛛暴发的原因，提出了防治红蜘蛛的几项措施。

Harm of Kanazawa Spiders Mite to Production of Silkworm Eggs and Its Control

The effects of the mulberry leaves which are attacked by the Kanazawa spider mite on the cocoon quality , mortality of cocoons and egg quality are investigated. Comparing to the control, the whole cocoon weight in the treatment drops by 16% to 18%, the cocoon shell weight declines by 20% to 23%, the mortality of cocoon raises about 6%,the weight of eggs drops by 20% to 24%, and the unfertilized eggs increases. The cause of kanazawa spider mites' break out this spring is analyzed. Some advices for the prevention and control of kanazawa spider mites are put forward.