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对褐稻虱的发生及危害研究,经过近三年的田间系统调查,现已基本明确:褐稻虱不能在本地越冬,其世代消长情况,也已有了初步的轮廓。在以往工作的基础上,1978年我们又继续研究了褐稻虱以及白背飞虱、灰飞虱在本地的消长规律,并研究分析了药治对策。褐稻虱消长规律的研究主要是通过对定点田的系统调查和定点观察的方法进行的。系统调查从早稻秧苗期(4月中旬)开始至二晚收割(10月底)时止,每隔4天进行一次。定点田早稻四丘,品种和栽插时间是:秀江早8号4月24日栽和4月26日栽,宜矮1号4月24日栽和4月28日栽;二晚四丘田,品种和栽插时间是:汕优二号7月19日栽和7月25日
The occurrence and damage of brown planthopper, after nearly three years of field system survey, has now basically clear: brown planthopper can not be in the local winter, its generation and growth and decline, but also has a preliminary outline. On the basis of past work, in 1978 we continued to study the brown planthopper and whitebacked planthopper, the Laodelphax stromal growth and decline in the local, and study and analysis of the drug control measures. The study of the growth and decline of brown planthopper mainly by systematic investigation of sentinel fields and fixed point observation method. Systematic surveys start from the early rice seedling stage (mid-April) and till the second harvest (end of October), every 4 days. Order field four early rice paddy, variety and planting time is: Xiujiang early April 4 planted on April 24 and April 26 planted should be short 1 April 24 planting and April 28 planted; two nights four mound Tian, breed and planted time is: Shanyou 2 planted on July 19 and July 25