论文部分内容阅读
1940年首先实际应用乳白病细菌防制日本甲虫的幼虫,为使用细菌防制昆虫提供了方法。1939～53年期间,美国东部14个州、区生产了109吨这种细菌的芽胞粉,使用在9万个地点。据观察,一块草地上的甲虫幼虫从原来的20～60条/呎~2减少到1～3条/呎~2,且一直保持这情况达9年以上。各种类似的菌种,对各种甲虫的防制已在推广应用。特别是腊质芽胞杆菌属苏云金杆菌的菌粉已有大量生产,并已用于多种昆虫的防制。苏云金杆菌于1950年发现,1958年开
The first practical application of mildew in 1940 to control Japanese beetle larvae provided a method for using bacteria to control insects. During 1939-53, 109 tons of spores of this bacterium were produced in 14 states of the eastern United States and were used at 90,000 locations. It has been observed that the larvae of beetles on a meadow have been reduced from 20 to 60 per square foot to 1 to 3 per square foot and have been maintaining this for more than 9 years. A variety of similar species, the control of various beetles in the promotion and application. In particular, Bacillus cereus Bacillus thuringiensis bacterial powder has been mass-produced, and has been used for a variety of insect control. Bacillus thuringiensis was discovered in 1950, opened in 1958