沙柳木蠹蛾的研究

沙柳木蠹蛾Holcocerus arenicola(Staudinger)是沙柳根部一种钻蛀性害虫.亦为害踏郎、酸刺、毛乌柳、柠条等.国内分布于内蒙、新疆、宁夏、陕西、甘肃等省(区). 该虫四年1代, 以幼虫在寄主蛀道内越冬.老熟幼虫5月上旬入沙化蛹;成虫6月初开始羽化, 中旬达盛期;7月上旬幼虫初孵, 取食、为害至10月下旬越冬.成虫白天静伏于沙柳丛, 傍晚8时半至10时半活动、交配、产卵, 趋光性强.雌蛾对雄蛾性诱力较强.成虫寿命2.9—4.1天, 产卵量平均265.4粒, 性比0.67—0.68:1.

A STUDY ON THE COSSID HOLCOCERUS ARENICOLA (STAUDINGER) IN SHAANXI

The cossid HOlcocems arenicola (Staudinger) is an important root-boring insect pest of Salix psammophila in Shaanxi, Nei Mongol, Ningxia, Gansu, etc. It also attacks Hippophae rham-noides, Salix microstachya, Caragana Korshinskii and Heey sarum in these arid regions. Our ob-servation has shown that four years are required for the pest to complete a generation. The mothes are very quiet at day-time and their mating and egglaying occur from 20:30 to 22:30 in the evening. The average number of eggs laid by each female moth is 265.4 and the mothes live only for 2.9 to 4.1 day. Our experiments have shown that this insect pest can be controlled by the following methods: 1. planting mixed forests, 2. trapping the mothes with ultra-violet lamps, 3. cutting Salix psammophila just under the earth surface once in three years, 4. and digging out and destroying the pupae and protecting and utilizing its natural enemies.