为了查明褐稻虱Nilaparvata lugens Stl在我县的越冬虫源,我站在原有工作的基础上,又于1979年1月7—22日和1981年6月,在四县八区境内采集了不同种类杂草20多斤,扩大调查和饲养观察,1979年2月23日将当年各地所采来的杂草分栽36缸,在温室内对褐稻虱卵进行饲养观察及分类鉴定,结果证明褐稻虱能以卵在背北风潮湿的沟边、圳边、塘边、田边李氏游草Leersia hexandra Sw.的茎秆髓部及裂缝处嫩芽鞘内过冬,是我省及长沙县早晚稻的有效虫源。 现将研究结果小结如下: 一、饲养调查情况 据我站多年的饲养和调查,褐稻虱成虫、若虫在我县及我省(除温泉外)任何寄主上都不能过冬。晚稻收割后至11月底初霜前后,除部分长翅型成虫从稻田迁往李氏游草及其他禾本科杂草上取食、产卵过冬外,多 In order to find out the overwintering source of Nilaparvata lugens Stl in our county, based on the original work, I collected in eight districts of four counties from January 7 to January 22, 1979 and June 1981 Different kinds of weeds more than 20 kilos, to expand the survey and feeding observation, February 23, 1979 the weeds collected throughout the year sub-planted 36-cylinder, in the greenhouse of brown rice louse eggs were observed and classification of identification results It is proved that the brown planthopper can survive in the buds and stems of the stalks and crevices at the stems and stems of Leersia hexandra Sw. Effective Pests of Early and Late Rice in Changsha County. Now the research results are summarized as follows: First, the feeding survey According to my station for many years of feeding and investigation, brown planthopper adults, nymphs in our county and our province (except hot springs) can not host any winter. Late rice after harvest until early November before the frost, except for some long-winged adults migrate from the rice fields to the grass and other grassy weeds on the feeding, spawning winter, and more