钩翅尺蛾生物学特性及防治研究

Studies on the Bionomics and Control of Hyposidra aquilaria Walker(Lepidoptera:Geometridae)

钩翅尺蛾是黑荆树重要食叶害虫，在福建ｌａ发生５代，以蛹在松土中越冬，翌年３月中旬成虫开始羽化。卵期平均７．２～９．３ｄ，幼虫期５龄，平均历期１８．４～２９．５ｄ；越冬蛹平均历期１４８．６ｄ，其余各代９．３～１３．１ｄ。成虫寿命６．３～８．２ｄ，每雌平均产卵６０４粒。主要天敌有中华茧蜂、螟蛉绒茧蜂、斜纹猫蛛、沟渠豹蛛等。林间２０％氰戍菊脂１００倍液大面积超低容量喷洒，以及施放白僵菌粉炮，均有良好防治效果。

Hyposidra aquilaria Walker is a serious pest of Acacia mearnsii De Wild.in Fujian Province. It has 5 generations a year and overwinters as pupa in the loosen soil. Adults begin to emerge in mid-March in the follow-ing year. The egg stage lasts 7.2～9.3 days.The larvae generally have 5 inst-ars and they last l8.4～29.5 days.The larvae feed on the tender leaves. The overwintering pupae lasts 148.4 days and the pupae of other generations last 9.3～13.1 days. The adult moths iive for 4～12 days.The average number of eggs of a female is found to be 604.The important natural enemies of H.aquilaria are Bracon chinensis ,Apanteles ruficrus and the spider Oxyopes sertatus, Pardosa laura.The effective measures to kill 1～3instar larvae are spraying 100 times of 20% Fenvalerate with ultra low volume or dusting Bea-uveria bassiana powder in the field.