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

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 following year. The egg stage lasts 7.2～9.3 days.The larvae generally have 5 instars 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 live 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 1～3 instar larvae are spraying 100 times of 20% Fenvalerate with ultra low volume or dusting Beauveria bassiana powder in the field.