生物农药配施对早季香稻病虫害的防治效果

选用有代表性的两个香稻品种培杂软香（杂交稻）和桂香占（常规稻），通过田间试验，研究了6个不同的生物农药和化学农药的混配组合对香稻稻纵卷叶螟、三化螟、二化螟和纹枯病的防治效果。结果表明:印楝素乳油＋苏云金杆菌(Bt)＋井冈霉素＋杀虫双混配组合对两个香稻的病虫害防治效果较佳,对四种病虫害的的防治率都在94%以上，且香稻产量较高。印楝素乳油＋苏云金杆菌(Bt)＋鱼藤酮乳油＋井冈霉素混配组合对培杂软香病虫害的防治效果显著，对四种病虫害的防治率高达94%；印楝素乳油＋苏云金杆菌(Bt)＋井冈霉素混配组合对桂香占病虫害的防治和增产效果明显，对卷叶螟的防治率为93%-96%，对其他三种病虫害的防治率高达98%。因此，在适当比例情况下，生物农药和化学农药配施防治香稻病虫害效果较好，且具有一定的保产效果。

Control Effect of Mixed Biopesticide on Aromatic Rice Diseases and Pests in Early Season

With the development of bio-pesticide application in agricultural production,the control effect of bio-pesticide is paid more and more extensive attention.Application of mixed bio-pesticides was becoming a trend.The control effects of six mixtures of bio-pesticide and chemical pesticide on leaf folder,yellow borer,chilo suppressalis and rice sheath blight of aromatic rice,＇Pei-zaruanxiang＇ and ＇Gui-xiangzhan＇ were studied by using filed experiment in this study.The results showed that the control effects of azadirachtin＋Bt＋ validamycin＋dimehypo on leaf folder,yellow borer,chilo suppressalis and rice sheath blight of aromatic rice,＇Pei-zaruanxiang＇ and ＇Gui-xiangzhan＇ were the best and the yield of aromatic rice was higher,control rates of all diseases and insect pests were over 94%.In addition,for ＇Pei-zaruanxiang＇,the treatment of azadirachtin＋Bt＋rotenone＋validamycin reduced significantly these disease and pests and guaranteed the yield,control rates were all over 94%;for ＇Gui-xiangzhan＇,the treatment of azadirachtin＋Bt＋validamycin had the same effects,the control rate of leaf folder was 93%-96%,the rest were up to 98%.