蒙古土象生物学及防治研究

STUDIES ON THE BIOLOGY AND CONTROL OF XYLINOPHORUS MONGOLICUS FAUST

作者于1986—1990年在河北省秦皇岛、唐山两市对蒙古土象进行研究,结果表明,该虫食性非常复杂,成虫为害严重。成虫集中在表土层产卵,卵期10—19天。幼虫经17龄,在50cm 以上土层中活动。幼虫期跨3个年度。蛹期15—20天。3年完成1代,以成虫和幼虫越冬。防治措施以治成虫为主,采取杨树枝诱集,小果树套塑料薄膜袋。大田播种时施毒土,是压低下一代虫口密度的关键。出苗后喷药防治成虫,效果良好,经济效益显著。

In 1986-1990,the biology and control of Xylinophorus mongolicusFaust were studied in Qinhuangdao and Tangshan Cities,Hebei Prov-ince.The results showed that it overwinters with adults and larvae.The recipe of this insect is rather complicate,and more severe damageis caused by adult.Most of the eggs are laid in upper soil layer with10-19 days of egg stage.The larvae go through seventeen instars acrossthree years,and move about in upper most fifty centimeters of soillayer,the pupal stage is in the range of 15-20 days.A series of control measures were used mainly against the adult,such as trapping with poplar twig bundles,caging with plastic bag toprotect the young fruit tree,etc.,in which the key measures were toapply the insecticides in surface soil at sowing time and spraying inseedling stage.