【摘要】 1977—1981年间,为防治北京地区温室白粉虱Trialeurodes vaporariorum(Westwood)的危害,自四川省重庆北碚中国农业科学院柑桔研究所引入座壳孢(Aschersonia)的寄生菌孢。经分离选出座壳孢的 A6S 菌株。在平均相对湿度 60—70％的春季温室内,对于黄瓜白粉虱1—2龄若虫的寄生率仅30-40％。后来,探索了该菌的生物学,使该菌对白粉虱的寄生率提高到90％,菌剂的材料成本降低到5％。更多还原

【Abstract】 In order to control the whitefly Trialeurodes vaporariorum in the greenhouses in Beijing suburb the parasitic fungus Asckersonia was introduced from Sichuan Province in 1977, from which the strain A6S was isolated. Preliminary tests in spring showed that the percentage of parasitization by this strain on the first and second instar nymphs of whitefly on-cicumber was only 30-40% in greenhouse. In order to improve the efficiency of whitefly control the biological characters of that strain and better method of its cultivation have been studied. As a result new isolates were obtained and the percentage of parasitization was raised to about 90% and the cost for production of the microbial insecticide was reduced to 5% of the original.更多还原