豚草天敌——豚草卷蛾发生规律的初步调查

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。

Preliminary Investigation on Occurrence Law of Epiblema strenuana——A Natural Enemy of Ambrosia antemisiifolia

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.;