跗粗角萤叶甲的生物学特性

跗粗角萤叶甲Diorhabda tarsalis Weise是甘草上的重要食叶害虫,成虫、幼虫危害甘草叶片及幼嫩组织。该虫在河北省保定1年发生3代,以成虫在土缝、洞穴或者枯枝落叶下面的疏松层中越冬。翌年4月下旬越冬成虫开始活动,4月下旬至5月上旬交配产卵,卵产于寄主根部10～15mm的疏松土层。第1代、第2代和第3代幼虫分别于5月中旬、7月上旬和8月上旬孵化,各代幼虫均能对寄主造成严重为害,幼虫3龄。记述该虫的寄主、生活年史、发育历期、生活习性,并提出防治建议。

Bionomics of the leaf beetle Diorhabda tarsalis

Diorhabda tarsalis Weise is an important leaf-eating pest on licorice and its adults and larvae damage the young twigs.It has 3 generations each year in Baoding of Hebei Province and the edults,over winter in crack of soil,cave or loose layer under litters.The adult of over wintering generation emerges in the third ten days of April.Next year and incubates from the third ten dads of April to the first third of May,The Ovum is laid in the 10～15 mm loosen solum at the root of host plant.The larva of the first,second and third generations hatches in the mid-May,in the first ten days of July and in the first ten days of August respectively,all of which can cause serious damage to the host.The larvae undergo 3 instars.This paper describes its host plant,Iife history,development duration,living habits,and finally recommends to the control methods.