论文部分内容阅读
1965年4月,瓜种蝇(Hylemyia platura Meigen)在山西大同城区人民公社和平生产大队的11个黄瓜阳蛙普遍发生为害,我们进行了观察和防治试验。 幼虫有避光性,终身栖居土中,多从瓜苗根茎部蛀入,由下向上为害,使子叶枯萎倒伏而死。随后,幼虫转株为害,造成瓜苗成片死亡。被害瓜苗一般每苗有虫一、二头。 幼虫猖獗为害与温、湿度有关。如1964年4月下
In April 1965, Hailingia fly (Hylemyia platura Meigen), a common species of eleven cucumber sunflies in the Peace Production Brigade of People’s Commune in Datong, Shanxi Province, was prevalent. We conducted observation and control trials. The larvae have a light-sheltered, lifelong habitat soil, and more from the root of the melon seedlings eroded, from the next up harm, cotyledons lodging and died. Subsequently, the larvae transplanted strains, resulting in melon seedlings died. Vicia melon seedlings generally have a worm, two. Larvae rampant harm and temperature, humidity. For example, in April 1964