大豆根蛇潜蝇发生规律及其防治研究

大豆根蛇潜蝇(Dphiomgia shibatuji Spencer)是大豆重要害虫之一,主要分布在东北及内蒙春大豆产区,尤以吉林、黑龙江两省为重。幼虫蛀食大豆根皮,造成根皮腐烂,严重影响养分和水分传导。危害轻者豆株生长缓慢,花英减少,重者枯死。大豆根蛇潜蝇一年发生一代,以蛹在豆茬上越冬,翌年5月中～6月上旬羽化,羽化盛期为5月下旬,6月上～下旬为幼虫为害期,6月中～下旬陆续化蛹越冬。成虫羽化的第二日交尾、产卵,产卵期为6.4～7.5天,产卵量为19.5～21.7粒,最多42粒,卵产于豆苗胚轴皮层内。卵期为3～4天,幼虫期为14天,共分为三个龄期。40%乐果乳油用种子量0.7%拌种,有显著效果。

STUDIES ON THE BIONOMICS AND CONTROL OF Ophiomgia shibatsuji Spencer

The soybean root maggot(Ophiomgia shibatsuji Spencer)is one of the most important pests infesting soybeans.It occurs mainly in the spring soybean growing regions of the Northeast China and the Inner Mongolian Autonomous Region,particularly in Jilin and Heilongjing Provinces.The larvae tunnel into the root cortex of soybean,cause the rot of the cortex and interrupt the conduction of water and nutrients,when injured slightly,the growth is retarded and the numbers of flowers and pods are reduced;while injured severely,the plants may be killed.