假隔链格孢SF-193菌丝的生长特性及其寄主选择性  

Growth Character and Host Range of Nimbya alternantherae SF-193 against Alternanthera philoxeroides

作　　者：陈志谊[1] 聂亚锋[1] 刘永峰[1] 刘邮洲[1] 罗楚平[1] 

机构地区：[1]江苏省农业科学院植物保护研究所,南京210014

出　　处：《中国生物防治》2009年第2期148-154,共7页Chinese Journal of Biological Control

基　　金：江苏省高技术研究项目(BG2007334);国家科技支撑计划项目(2006BAD08A02)

摘　　要：室内条件下,研究了不同培养条件和营养条件对空心莲子草生防真菌假隔链格孢Nim- bya alternantherae菌株SF-193菌丝生长的影响,测定其对27科86种植物的安全性。结果表明,生防真菌SF-193菌株的最佳生长温度约为30℃,最适生长pH值为10～11,生长过程中需要适当的空气,光照条件对SF-193生长没有影响;以玉米粉、黄豆粉作为碳源,以蛋白胨、牛肉膏作为氮源的培养基成分最有利于SF-193菌株的生长。SF-193菌株对绝大多数非靶标植物、尤其是对大田主要农作物和蔬菜均不致病,安全性良好。Nimbya alternantherae SF-193 is a strong phytopathogenic fungus causing foliar and stem necrosis of Alternanthera philoxeroides. However, the growth character and the security of the fungus are still unclear. Tests on its cultural and nutritional requirements showed that the optimum temperature for the growth was about 30℃, the range of optimum pH value was 10 - 11, proper air was needed for the growth, but there was no correlation between the illumination and growth of the fungus. The mediums of carbon source based on corn powder and soybean powder and nitrogen source on peptone and beef were the most beneficial to the growth of SF-193. Security tests on 86 non-target plant species in 25 families revealed that SF-193 was not pathogenic to the majority plants, especially to crops and vegetables indicating its potential as a biological herbicide against alligator weed.

关 键 词：空心莲子草 假隔链格孢SF-193 生物学特性 安全性 

分 类 号：S451[农业科学—植物保护] S476.19