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小菜蛾是柳州市郊区十字花科蔬菜的主要害虫之一.由于连续使用常规杀虫剂,小菜蛾的抗药性日益增强.为寻找高效低毒、低残留杀虫剂,我们于1991年进行了微生物农药Bt粉剂防治小菜蛾的药效试验和示范.试验在市郊白露乡白露村菜农的结球甘兰上进行.设Bt粉剂(湖北省生产,活孢子含量120亿个/ml)300倍,2.5%敌杀死(法国产)1500倍,以清水为对照,小区面积0.05亩,重复3次,随机排列.每小区定
Plutella xylostella is one of the major pests of cruciferous vegetables on the outskirts of Liuzhou City.Due to the continuous use of conventional insecticides, the resistance of Plutella xylostella to insecticides is increasing day by day.In order to search for high efficiency, low toxicity and low residue insecticides, we carried out Microbial pesticides Bt powder efficacy and prevention and control of diamondback moth experiments and experiments in the suburbs of Bai Lu village Bai Lucun cabbage farmers carried on the set Bt powder (Hubei production, living spores 120 million / ml) 300 times, 2.5% of the enemy killed (France) 1,500 times, with water as a control, the plot area of 0.05 acres, repeated 3 times, randomly arranged.