据福鼎、霞浦等县报道,1993年稻粉虱大发生。稻粉虱原是水稻上极为次要的害虫,由于发生量不大,危害不严重,一直未引起人们注意。今年稻粉虱在福鼎、霞浦等县单、双晚稻上陆续发生危害。福鼎县全县发生面积达14万亩,其中单季稻叶片霉污枯死面积1500亩,双晚田虫口密度很高,一张叶片上有若虫73—85头,多的上百头,严重发生面积达23000亩;霞浦县双晚田多的每张叶片有若虫21头,少的3头,平均每叶有若虫7.5头,成虫多的稻丛只轻轻一动,就有灶灰 According to Fuding, Xiapu County reported that in 1993 rice whitefly occurred. Rice whitefly is a very important pest on rice, because of the small amount of occurrence, the harm is not serious and has not drawn any attention. This year, whiteflies in Fuding, Xiapu and other counties, double late rice one after another harm. Fuding county county area of ​​140,000 mu, of which single leaf mold mildew dead area of ​​1500 mu, double night field insect population density is high, a leaf on the nymph 73-85, more than a hundred, a serious occurrence area Up to 23000 acres; Xiapu double late night and more leaves each have nymphs 21, less 3, an average of 7.5 nymphs per leaf, adult more rice only gently move the paddy, there are gray