榆跳象生物学特性及防治

榆跳象是榆树重要食叶害虫之一，在甘肃省张掖地区１年发生１代，以成虫越冬。成虫取食叶肉，幼虫潜叶危害。成虫期根施３％呋喃丹颗粒剂或２５％溴氰菊酯乳油２０００倍稀释液树冠喷雾，防治效果可达９０％。

Bionomics of Rhynchaens alini L. and its control

The elm flea weevil, Rhynchuenus alini L., is one of important leaf- eating pests feeding on elm trees. It occurs one generation a year and overwinters by adult in Zhangye District, Gansu Province. Adult feeds on underside of elm leaves. Mining in the leaves by larvae causes main damage to bees. It can be effectively controlled by using of 3 % Carbofuran in soil near trees or spraying Decamethrin during the period of adults.