苎麻蝙蛾发生规律的研究

苎麻蝙蛾（Phassus jianglingensis Zeng et Zhao）是近几年来严重为害苎麻蔸部的一种新害虫。它以幼虫蛀食苎麻地下茎,形成隧道,严重影响地上部分的生长;研究表明该虫在湖南年发生一代,以幼虫在地下茎的隧道中越冬;翌年4月中旬化蛹,蛹期25天左右;5月上旬羽化,成虫寿命6-10天,无趋光性,白天停歇,晚间也很少活动,无需补充营养。6月上中旬出现新一代幼虫,幼虫期可长达320天,有相互残杀的习性。

Studies on the Occurance Regularity of Phassus jianglingensis Zeng et Zhao

Phassus jianglingensis Zeng et Zhao is a new pest that severely damage the root part of ramie (Boehmeria nivea L. ) in recent years which nibbles the root of ramie in the shape of tunnel and the growth of above ground part of ramie is severely retarded. It was revealed that the pest happened once a year in Hunan province , overyeared in root tunnel in the form of larva, pupated in the next mid - April and lasted for 25 days, emerged in early may and the life for imago is 6 - 10 days. The imago was not phototactic, rested in daytime, seldom moved at the night, and no additional nutrition was needed. New generation of larva appeared in mid - June and larva stage would last for 320 days. The larva had a habit of mutual killing.