茭白田二化螟越冬代幼虫生物学特性的观察  

Observation on Biological Characteristic of Striped Stem Borer over Wintering in Zizania Habitat

作　　者：阮雪莲[1] 胡南[1] 黄云[1] 董兆克[1] 张国安[1] 

机构地区：[1]华中农业大学昆虫生态研究室,武汉430070

出　　处：《华中农业大学学报》2006年第1期37-39,共3页Journal of Huazhong Agricultural University

基　　金：国家自然科学基金项目(30571228)资助

摘　　要：调查了茭白田二化螟越冬代幼虫的种群年龄结构、幼虫存活率以及它们在茭白残株上的分布情况，并对其冬后取食行为和化蛹动态进行了观察。结果表明，二化螟越冬代幼虫龄期极不一致，幼虫存活率为78．62％；越冬幼虫大多身体蜷缩成半圆形或圆形，位于离泥土面0～5cm的茭白苔管处；4～6龄越冬幼虫均有取食现象，且不同龄期幼虫取食比例存在着一定的差异；未取食的个体化蛹进度快于取食个体，未取食个体以4龄幼虫的化蛹时间较早。The age structure and living ratio of striped stem borer（Chilo suppressalis） over wintering in Zizania habitat was investigated. Post-winter feeding and pupation dynamics were observed among larvae in different instars. The result showed that the age of Chilo suppressalis was in uncommunality and the living ratio of larvae was 78. 62%. The place where the larvae lay was the low part of one Zizania. The 4th, 5th and 6th instars larvae had post-winter feeding,and different proportion. The larvae without feeding pupated greatly earlier than those feeding. Feeding individuals in 4th instars pupated ear lier than those in other instars.

关 键 词：二化螟 年龄结构 生物学特性 

分 类 号：S435.112.1[农业科学—农业昆虫与害虫防治]