摘要
通过对我国棉花黄萎病菌 V_B 与已知的美国落叶型黄萎病菌 T_9以及我国非落叶型黄萎病菌 V_6、V_10进行对照比较研究,所得结果表明,菌系 V_B 为强致病力,病株落叶成光杆,在6个抗感不同的棉花寄主上致病,平均病情指数达54.6;对不同温度反应显示偏耐高温,适宜生长温度为20～30℃,最佳温度25℃;在 PDA 培养基上菌落白色,微菌核不明显,呈束状膨胀菌丝团等生理特性方面,均和美国落叶型黄萎菌 T_9表现趋于一致,而与非落叶型黄萎菌系差异明显。从而证实江苏常熟徐市的棉花黄萎菌系 V_B 是落叶型的病原菌。为综合防治提供科学依据。
One strain of Verticillium wilt V_B isolated from cotton in China was studied for comparing with the known American defoliating type strain T_9 and the non-defoliating type strains V_6 and V_(10)of cotton in China.The results showed that strain V_B had the virulent pathogenicity and could infect cotton and defoliate completely.Strain V_B caused disease on 6 cotton cultivars tested and the average disease index got 54.6.The temperature test predicated strain V_B could endure the higher temperature,it grew properly between 20～30℃,and the optimum growing condition was 25℃.When cultured on PDA culture medium,colonies were white with unclear microsclerotinie and sarciniform,intumescent hyphae masses.All of the physiological characteristics were similar to those of the American defoliating type strain T_9, and obviously different from non-defoliating type strains.Tests proved that strain of Verticilli- um wilt V_B in cotton collected from Changshu,Jiangsu province,is belonged to the defoliating type strain.
出处
《棉花学报》
CSCD
北大核心
1993年第1期89-92,共4页
Cotton Science
关键词
棉花
落叶型
黄萎病菌
cotton
defoliating tyep
Verticillium wilt
