在桂南双季稻地区,早稻的增产与否对全年的稻谷产量具有决定性的影响。因为,在一般情况下,早稻的病、虫、风害都比较少,只要禾苗生长良好,丰收即已在望。并不象晚稻那样,非得要全部收获以后才能决定产量的多少。而在早稻生育期间,一般来说,也是前期病、虫害较少,后期则较多。因此,在早稻孕穗期以后做好各种主要病、虫发生趋势预报,以防患于未然,这已经是摆在人们面前的严重任务了。本文就是从这点出发,并根据多年历史资料,应用“多因子综合相关”法,对水稻三化螟第二代的发生趋势(螟害白穗率)进行了初步探讨。结果如 In the double cropping paddy region of Guinan, the increase of early rice will have a decisive influence on the annual paddy output. Because, under normal circumstances, early rice disease, insects, wind damage are relatively small, as long as the seedlings grow well, harvest is already in sight. Not like late rice, you have to fully harvest before you can decide how much output. In the early rice growth period, in general, but also pre-disease, fewer pests, later more. Therefore, it is already a serious task for people to do a good job of forecasting various major diseases and insect pests after the booting stage of early rice to prevent any possible future occurrence. This article is based on this point, and based on multi-year historical data, the application of “multi-factor integrated correlation” method, the occurrence of the second generation of rice stem borer Borer (pests white spike rate) were discussed. Results as