广西北部湾桐花树毛颚小卷蛾生物学特性及防治

桐花树毛颚小卷蛾Lasiognatha cellifera Meyrick是广西北部湾桐花树的主要害虫,通过室内饲养和林间观察研究,对桐花树毛颚小卷蛾各虫态的形态特征进行了描述,基本了解其生活习性及生活史。该虫在广西北部湾地区1a发生12代,世代重叠。以2~3龄幼虫在桐花树叶片上卷叶越冬,3月上旬开始羽化为成虫,1~2d后即交配产卵,平均每雌产卵量76粒。卵历期2~4d,幼虫历期11~15d,蛹历期7~8d,成虫寿命约6d;该虫有2个明显的危害高峰期,分别出现在春季和秋季。提出桐花树毛颚小卷蛾的初步防治建议。

Bionomics and control of Lasiognatha cellifera in Beibu Gulf of Guangxi

In Beibu Gulf of Guangxi,Lasiognatha cellifera Meyrick was the major pest attacking Aegiceras corniculatum.The morphological characters of the adult,egg,larva and pupa of L.cellifera were described and its life cycle and habits were studied based on the observation in mangrove forest and rearing in the laboratory.The pest had 12 generations a year in Beibu Gulf and the generations overlapped,It overwintered as the 2nd-3rd instar larvae in rolled leaves.The adult of the overwintering generation appeared in t...