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4.以菌治虫:主要是细菌和真菌两大类。细菌农药是研究开发最早的用于生物防治的生物农药,已有100多年的历史。目前已筛选的杀虫细菌有百余种,其中制成产品大面积应用的有苏云金杆菌、日本金龟子芽孢杆菌、球形芽孢杆菌、缓病芽孢杆菌4种。而苏云金芽孢杆菌(简称Bt)制剂是二十世纪生物防治的主导产品,也是至目前为止,发现时间最早、研究层面最系统、开发利用最深入、产业化程度最高、生产数量最多、施用面积最广、应用前景最好的生物农药制剂,已被公认为生物农
4. To bacteria governance worms: mainly bacteria and fungi two categories. Bacterial pesticides are the earliest research and development of biological pesticides for biological control, has more than 100 years of history. At present, there are over 100 kinds of insecticidal bacteria that have been screened, among which Bacillus thuringiensis, Bacillus subtilis, Bacillus sphaericus and Bacillus lentus are widely used in large area. The Bacillus thuringiensis (Bt) preparation is the leading product of biological control in the 20th century. So far, it has found that the earliest time, the most systematic research level, the deepest development and utilization, the highest degree of industrialization, the highest production volume and the most applied area Wide application prospects of biological pesticide formulations, has been recognized as bio-agriculture