南岭黄檀卷叶象生物学特性与防治

南岭黄檀卷叶象是南岭黄檀的重要害虫、成虫食叶和卷叶产卵为害．该虫在福建一年发生１代，以成虫越冬．翌年３月中旬，南岭黄檀展叶后，越冬成虫开始上树活动，哨食嫩叶，四月初成虫开始产卵．卵期５～７天，幼虫共２龄，幼虫期９～１２天，化蛹前成熟幼虫分泌粘液在卷苞内做成内壁光滑的蛹室，蛹期３～５天．成虫羽化后在卷苞中停留２～３天，然后将卷苞咬一圆形孔洞爬出危害，５月中旬为成虫羽化盛期．试验表明，用５０％甲胺磷乳剂１０００倍液、８０％敌敌畏乳剂１２００倍液在每年４～５月紫胶虫放养前喷雾防治成虫，效果可达至９１．２％～９５％，在成虫产卵期摘除卷苞，集中处理是消灭虫源的有效措施．

Bionomics of Leafroller Weevil(Byctiscus sp.)and Its Chemical Control

The leafroller weevil(Bytiscus sp)is a serious pest of Deabergia balansae Prain in Fujian.The studies on bionomics and control of this weevil during period from 1989 to 1992 showed that the pest reproduces only one generation each year and overwinters as adiut.The adult started to lay eggs in early April and the egg stage lasted for 5 to 7days.The larvae generally have two instars and lasted between 9 and 12 days.Spraying with 80% Dichiorvos or 50% Methamidophos on the infected shoots is an effective control measure over this pest.