豚草天敌——豚草卷蛾发生规律的初步调查

Preliminary Investigation on Occurrence Law of Epiblema strenuanaA Natural Enemy of Ambrosia antemisiifolia

对南昌地区豚草卷蛾的形态特征、生物学特性和发生规律进行了初步观察和调查,结果表明:豚草卷蛾专食豚草,一年发生4～5代,7～8月发育较快,6～9月有虫株率达20.67%～58.23%,以老熟幼虫在豚草茎秆内越冬,越冬虫源基数平均为0.47头/株。

The morphological character, biological character and occurrence law of Epiblema strenuana in Nanchang city were preliminarily observed and investigated, the results indicate that E.strenuana feeds on Ambrosia antemisiifolia specially, reproduces 4～5 generations every year, and develops quickly in July and August. The rate of plant with this insect from June to September ranges from 20.67% to 58.23%. The mature larvae of E.strenuana overwinter in the stalk of A. antemisiifolia, the overwintering population averages 0.47 head per plant.\;