白雪灯蛾及其防治方法的初步研究

PRELIMINARY STUDG ON WHITE TIGER MOTH [Spilosoma niveus (menetries)] AND THE CO NTROL METHODS

摘要:

灯蛾类是吉林省近年来普遍发生危害较重的一类害虫。其中白雪灯蛾Spilosoma niveus(Menetries)是主要优势种之一。该虫分布广,寄主多,幼虫期长,抗药性强。在我省一年发生一代,以高龄幼虫越冬,并以越冬幼虫在苗期危害最重。成虫趋光性较强,幼虫龄期多,爬行迅速,有明显的假死性。防治措施当前仍以化学防治为主,辅之以必要的农业措施和人工防治。天敌情况,除发现幼虫期有白僵菌寄生外,尚待进一步调查。

Abstract:

The white tiger moth spilosoma niveus (Menet.) is a Serious pest of many crops. It is widely distributed in Jilin province. There is one generation in a year winter is passed as larvae of 6—8 instars. Most of the damage was caused by the overwintering larvae in seedling stage. In general, the larva has 8 instars. The young larvae are gregarious in the initial stages but sequently disperse.The pupal stage lasts from 26 to 33 dags. The eggs are laid in masses on the undersid’e of leaves and hatch after 6—8 days.
Chemical or artificial Catch control provided good effect. Suspension fluid of dichlorovos, Fenitrothion (Sumithion) and sumicidin etc. are all very effective against larvae of 3—4 instars. Eefficiencg of Fenitrothion (Sumithion) was the highest and diflubenzuron. B t etc. was lower.