黑荆大造桥虫的生物学特性及防治

Bionomics of Mugwort Looper Ascotis Selenaria Cretacea Butter and Its Control

黑荆大造桥虫是黑荆树的一种重要食叶害虫,在福建南平一年发生5代,以蛹在松土中越冬,翌年3月上旬成虫开始羽化。幼虫共6龄,卵期5—9天,幼虫期22—43天,蛹期越冬代127—142天,其余各代10—19天。已知天敌有螟蛉绒茧蜂及白僵菌。试验表明,溴氰菊脂、敌百虫、敌敌畏和辛硫磷等农药对幼虫均有良好防治效果。冬季抚育松土消灭越冬蛹。

The mugwort looper Ascotis selenaris cretacea Butter is a serious pest of Acacia mearnsii in Fujian Province. This paper reports the results of our studies on the bionomics and control of this pest from 1987 to 1991. It has: five generations a year and overwinters as pupa in the soil in Nanping, Fujian Province. Adult moth begin to appear in early March next year. The egg stage lasts 5-9 days. The larvae generally have six instars and they last 23-43 days. The overwintering pupal stage lasts 127-142 days and the others last 10-19 days. Apantoles ruficrus ( Haliday ) is major natural enemy. The effective measures to Control the larvae are spraying with 2.5% Deltamethrin, 90% Dipterx,80% Dichlorvos or 50% Phoxim. Manually loosening the soil to kill the pupa in winter could also be effective.