论文部分内容阅读
我场地处苏北射阳沿海,稻纵卷叶螟和稻飞虱是近年水稻生产的大敌,为了探明其发生规律,为预报和防治服务,我们对稻纵卷叶螟和稻飞虱进行了一些初步观察和系统调查。 1973年和1974年秋天,我们对稻纵卷叶螟越冬场所、方式进行了调查。发观末代稻纵卷叶螟幼虫和蛹在田、沟边、芦苇上较多,我们收集了一批芦苇上的幼虫和蛹,集巾到长有芦苇的观察小区和室内饲养观察,让其在室外自然条件和室内自然温度下越冬。观察中发现,除一些低龄幼虫外,其余均化蛹进入冬季,但二年均未发现越冬成功的幼虫和蛹。
My field is located in northern Jiangsu Sheyang coastal areas, rice leaf roller and rice planthopper is the enemy of rice production in recent years, in order to find out its occurrence, for the prediction and prevention services, we rice leaf roller and rice planthopper A few preliminary observations and systematic surveys were conducted. In 1973 and the autumn of 1974, we conducted a survey on the wintering places and ways of the rice leaf roller. In the late stage of development, the larvae and pupae of Cnaphalocrocis medinalis showed more larvae and pupae on the fields, gullies and reeds. We collected a series of larvae and pupae on reeds and set them on observation cells with reeds and indoor rearing observations Wintering in outdoor natural conditions and indoor natural temperatures. During the observation, except for some young larvae, all the other pupas were homogenized into the winter, but over two years, no successful larvae and pupae were found.