盈江县石梓叶甲生物学特性及防治

Bionomics and control technique of Craspedonta leayana insulana (Gressitt) in Yingjiang

石梓叶甲(Craspedonta leayana insulana(Gressitt))在盈江县1a发生3代,以成虫在树皮缝隙、阴凉处或土中越冬,翌年5月初出来产卵,6月中旬第1代成虫出现,8月初第2代成虫出现,9月底第3代成虫出现,10月中下旬开始越冬。应用20%灭扫利乳油、2.5%联苯菊酯乳油、90%敌百虫晶体1000倍和2000倍液进行了室内和田间喷雾防治试验,3种药剂的1000倍与2000倍液对成虫和幼虫致死率没有显著的差异。

Craspedonta leayana insulana（Gressitt）occurs 3 generations per year in Yingjiang.It overwinters with adult in the bark cracks,shade or soil near the host tree.The overwintering adults appear and oviposit in May next year.Adults of the first generation emerge in mid-June and the second generation emerge in the mid-august and the third-generation emerge at the end of September.Adults of the third-generation move to the bark cracks,shade or soil and overwinter from the middle to the end of October.1：1000 and 1：2000 of 20% fenpropathrin EC、2.5% Bifenthrin EC and 90% Trichlorfon Crystal were sprayed during the adult and larva stages both in the room and the field experiments,the results show that all of the three pesticides have effective control effects to Craspedonta leayana insulana.