桑瘿蚊(Diplosis moricala Mats.)近年来在川北地区普遍发生,已成为重要的桑树害虫之一。经1983、1984两年调查已初步掌握其发生特点和防治对策。 一、发生特点 以幼虫吸食桑树嫩芽汁液,一年发生4至5代,以休眠体在土中越冬。桑树被害后,轻者顶芽弯曲畸形,重者顶芽枯死。 此虫喜在低洼潮湿的桑园栖息,经多点调查和室内饲养发现,成虫飞翔力强,蔓延 Diplosis moricala Mats. Has been common in northern Sichuan in recent years and has become one of the important mulberry pests. After 1983,1984 two years of investigation has initially mastered its characteristics and prevention and control measures. First, the occurrence characteristics of larvae mulberry sprout juice intake, occurring four to five generations a year to the dormant body in the soil overwintering. After the mulberry was killed, the light buds malformed deformity, severe buds dead. This insect hi in the low-lying wet mulberry habitat, after many surveys and indoor feeding found that adults flying strong, spread