论文部分内容阅读
近十多年来,由于农业和林业上长期大量使用化学农药,破坏了大自然的生态平衡,污染了环境,给人类造成了灾难.所以世界上绝大多数国家对生物防治普遍重视起来.利用昆虫病原微生物防治农林害虫,是生物防治工作中的重要组成部分.昆虫病原微生物包括病毒、立克次氏体、细菌、真菌和原生动物等.目前国内外研究和应用的主要对象是细菌、真菌和病毒三大类.立克次氏体还在试验阶段. 细菌治虫目前,已分离到的昆虫病原菌的菌种和变种约有100种,其中研究最多、效果最好的是芽孢杆菌属的苏云金杆菌类和日本金龟子芽孢杆菌. 1.苏云金杆茵苏云金杆菌类是广谱杀虫细菌.1902年
In the past ten years or so, the widespread use of chemical pesticides in agriculture and forestry has undermined the ecological balance of nature, polluted the environment and caused disasters to human beings, so most countries in the world generally value biological control. Insect pathogenic microorganisms control pests in agriculture and forestry, and are important components in biological control.Enthetic pathogenic microorganisms include viruses, rickettsia, bacteria, fungi and protozoa etc. At present, the main research objects and applications at home and abroad are bacteria, fungi And viruses. Rickettsia is still at the experimental stage. Bacterial pest control At present, there are about 100 species and varieties of insect pathogens that have been isolated, of which the most studied are the best Bacillus genus Suyun Bacilli and Bacillus japonicus 1. Bacillus thuringiensis Bacillus thuringiensis is broad-spectrum insecticidal bacteria. 1902