武汉地区粘虫的种群动态及越冬规律  

Population Dynamics and Wintering Pattern of Mythimna separate Walker in Wuhan

作　　者：丛胜波[1] 万鹏[1] 黄民松[1] 武怀恒[1] 许冬[1] 王金涛[1] 

机构地区：[1]农业部华中作物有害生物综合治理重点实验室/湖北省农业科学院植保土肥研究所,武汉430064

出　　处：《湖北农业科学》2015年第23期5904-5907,共4页Hubei Agricultural Sciences

基　　金：湖北农业科技创新项目(2011-620-003-03-02)

摘　　要：研究了粘虫(Mythimna separate Walker)在武汉地区的种群动态及其越冬规律。结果表明,粘虫成虫在武汉地区主要有两个发生高峰,分别为4月中下旬和10月中下旬。田间粘虫幼虫发生的高峰期主要在11月至次年的3月。有再生苗的稻田内粘虫幼虫的发生量显著高于无再生苗的稻田。在越冬期间,粘虫并未进入滞育状态,而以幼虫形态越冬。粘虫幼虫在越冬期间的过冷却点与冰点均随发育程度上升而下降;死亡率则随温度的降低显著上升,两者之间的关系可用线性方程y=-1.529 1x+28.459 0表示。Population dynamics and wintering pattern of Mythimna separate（Walker） in Wuhan area were investigated. The results indicated that the occurrence of M. separate moths existed two peaks in Wuhan, namely mid or late April and mid or late October, respectively. Larvae occurred usually between November and March of next year. The number of larvae was significantly higher in rice fields with than that of without regenerated seedlings in rice fields. During wintering stage, M. separate did not diapause, but kept active as larvae. It was also found that the super-cooling point and freezing point of larvae presented a decreasing tendency along with the increase of larval development. Simultaneously, the mortality rate of M. separate larvae during wintering stage was significantly increased with the decrease of temperature. The relationship between two factors could be described as a linear equation： y=-1.529 1x＋28.459 0.

关 键 词：粘虫(Mythimna separate Walker) 越冬 过冷却点 迁飞 

分 类 号：S433.4[农业科学—农业昆虫与害虫防治]