杞柳瘿蚊年生活史研究

Annual Life Cycle of Rhbdophaga SP

为掌握杞柳瘿蚊年生活史,采用室内观察与室外定点标记观察法,对杞柳瘿蚊的年生活史进行了持续观察研究。结果表明:杞柳瘿蚊在霍邱县沿淮区域于每年3月下旬开始发生为害,1年可发生2~4代,卵期4~6d,幼虫期20~25d,蛹期10~12d,完成1代的历期35~40d。杞柳瘿蚊的幼虫或蛹从第2代(5月下旬)开始滞育,存在越夏滞育、越夏至越冬滞育现象。

In order to master the annual life history of Rhbdophaga SP, indoor observation and outdoor fixed-point marking observation were used in the experiment,the annual life history of Rhbdophaga SP was observed and studied continuously. The results showed that:Rhbdophaga SP in the huai area of huoqiu county in late march every year began to harm, 2~4 generations can occur in a year, this insect the spawn stage 4~6 d, the larval stage 20~25 d, the pupal stage10~12 d, the duration to complete a generation in 35~40 d. Diapause begins in the second generation(In late may) in the larva or pupa of Rhbdophaga SP, there is oversummer diapause、the phenomenon of diapause between summer and winter.