摘要
生物农药纯苏云金杆菌(Bt)制剂与化学农药25%杀虫双水剂复配在水稻纵卷叶螟防治上的应用试验表明:采用Bt1500mL/hm2+25%杀虫双1500mL/hm2在水稻纵卷叶螟卵孵化高峰期喷施效果最好,4d防效达96 94%,8d防效达97 38%,白叶率防效达96 46%,同时对天敌影响很小,对环境影响也较纯化学农药大大减小,具有明显的经济效益和生态效益。
The control effects of compound of biological insecticide Bacillus thuringiensis(Bt)and 25?% aqueous shachongshuang on Cnaphalocrocis medinalis were studied.Results showed that appling the mixtures of Bt1500mL·hm-2+shachongshuang 1500mL·hm-2 at egg-hatching peak stage had the best control effect.The mortalities of Cnaphalocrosis medinalis would be 96.94?% in 4d,97.38?% in 8d,respectively,and control effect of whitening leaf reached 96.46?%.The trials indicated there was little harmful to natural enemy and had less pollution of environment than chemicals with the characteristics of good economical and ecological benefit.
出处
《西南农业学报》
CSCD
2002年第4期79-81,共3页
Southwest China Journal of Agricultural Sciences
关键词
苏云金杆菌
复配剂
防治
水稻
纵卷叶暝
Cnaphalocrocis medinalis
egg-hatching peak
mixtures of Bt and chemicals
mortality
natural enemy
