白蛾蜡蝉生物学特性及防治初步研究

白蛾蜡蝉在湖北仅为害柑桔，一年发生２代，以成、若虫群集叶背、嫩梢吸汁为害，造成枯梢与落叶；经试验，于３月下旬～４月上旬喷射８０％敌敌畏乳剂或５０％杀螟松乳剂１０００倍液，间隔半月，连喷２次防治越冬成虫，防效显著。

Primary Study on the Bionomics andChemical Control of Lawana imitata Melicher

Lawana imitata Milicher in Hubei only damages Citrus,it occurs in two generations and overwinters in sex-inmature adults each year;in its occurence peroid,its adults and nymphs aggregate on the leaf'sbacks or tender shoots to suck the tree's saps,eventually, resulting in dead shoot and defoliation. To controlthe overwintering adults,the authors used 1000: 1 dilute 80% dichlorphos or 50% fenitrothion emulsion tospray every attacked tree two times (with half a month interval ) during the March's frist ten days to theApril's last ten days,the results showed that there is a significant control efficiency.