城市角斑古毒蛾的生物学及综合治理研究

STUDIES ON THE BIONOMICS OF ORGYIA GONOSTIGMA (LINNAEUS)AND ITS INTEGRATED MANAGEMENT IN URBAN ECOTOPE

角斑古毒蛾Ｏｒｇｙｉａｇｏｎｏｓｔｉｇｍａ（Ｌｉｎｎａｅｕｓ）．在四川南充市年发生４代，较整齐，以４龄滞育幼虫在寄主枝干跷皮内越冬，滞育期１５０余天。雌虫无翅，卵成堆产于茧壳上。雄虫具翅两对，趋光性弱。无孤雌生殖现象。１～３龄幼虫群集取食，在树冠内为奈曼Ａ型分布型；４龄期为负二项分布型；５～６龄暴食期高度分散，呈随机分布型。天敌种类多，对该虫有显著抑制作用。冬季彻底刮除寄主枝干跷皮，清除地面落叶、杂草及砖石缝隙等越冬场所的滞育幼虫；生长季节及时剪除低龄幼虫集中取食的枝梢或局部喷药挑治中心虫团，或根部施呋喃丹等综合治理措施，能有效地控制该虫的严重为害。

Orgyia gonostigma (Linnaeus),a leaf-eating insect attacking many ornamental plants,wasfound to have 4 regular generations. Its diapausing 4-instar larvae hibernated in the scaly barks ofthe host trees.The diapausing peried lasted more than 150 days.The female adults had no wingsand laid their eggs on the cocoons.The male adults had two pairs of wings and showed weakphototaxis.No parthenogenesis was observed.1-to 3-instar larvae were found to feed in groups,persenting a Neyman type A distribution within the crown,while 4-instar larvae presented anegative binomial distribution. The hungry 5-and 6-instar larvae scattered among the leaves andpresented a random distribution, This pest had many natural enemies,thus providing considerablecontrol.Removal of the scaly barks of the host trees and the fallen leaves and plant litters on theground,clearing the places where the hibernating larvae may stay,cutting-off of the young shootson which the feeding larvae are concentrated,partial application of pesticides,treatment of the treeroot with. Furadan and manual removal of larva mass all these measures are effective forcontrolling this pest.