2006年铜仁市水稻三化螟大发生原因分析及防治

Reasons Analysis & Prevention to Yellow Rice Borer Outbreak of Tongren City in 2006

三化螟是一种钻蛀性水稻害虫,2006年在铜仁市大规模发生,其特点为:第三代大发生,面积大,中迟熟品种受害重,发蛾早,灯下、田间蛾量多,峰期多,危害时间长。造成大发生的主要因素有气候、虫口基数、品种布局、育秧方式、施肥水平、农药和防治技术等。防治以"预防为主,综合防治",采用消灭越冬代、主治第一代、挑治第二代、狠治第三代的防治技术。

Borer is a rice pest with broaching,it is occured in Tongren city in a large scale in 2006.Its characteristics:the third generation in the area,re-victimized in the late-maturing varieties,the moth early,lamps,in the fields of the moth Multi-peak period,against a long time.Result in a major factor in climate,base pest species distribution,seedling,fertilizer,pesticides and control technology.Control "focusing on prevention and integrated control" by the elimination of the winter,the head first and second generation pick governance,and ruthless rule of the third generation of technology.