棉花黄萎病发生时间动态及与菌量和菌系致病性的关系  

Seasonal Dynamic Cotton Verticillium dahliae wilt,Correlation Analyses between Incidence and Inoculum Density and Virulence of Strains

作　　者：张丽萍[1] 宋玉萍[2] 岳永亮[1] 任毓忠[1] 金恭玺[1] 李国英[1] 

机构地区：[1]石河子大学农学院,新疆石河子832003 [2]石河子大学实验场,新疆石河子832000

出　　处：《新疆农业科学》2014年第8期1468-1473,共6页Xinjiang Agricultural Sciences

基　　金：石河子科技局项目(2012NY04)

摘　　要：【目的】明确新疆棉花黄萎病发生的时间动态及与菌量和菌株致病性的关系,为该病防治打下基础。【方法】采用病圃常规定点调查的方法,研究病害在新疆发生的时间动态,应用室内常规伤根接种法确定发病程度与菌量和菌株致病性的关系。【结果】该病在石河子地区一般于6月上中旬在田间开始发病,6月下旬后病害发展缓慢,7月中下旬后病害发生明显增加,8月中下旬进入发病高峰。病害的发生与菌量和菌株致病性呈明显正相关。【结论】明确了该病在新疆石河子棉区发生的时间动态,查明了其发病程度与菌量和菌株的致病性有十分密切的关系。【Objective】This project aims to ascertain seasonal dynamic of the cotton Verticillium dahliae wilt and the correlation between incidence and inoculum density and virulence in Xinjiang which might contribute to the disease control.【Method】Temporal dynamic was surveyed applying systematic investigation from the diseased garden,and the relationship between,incidence and inoculum density and virulence was explored by using root cutting inoculation in lab. 【Result】The result showed that symptoms of cotton V. dahliae wilt generally appeared on early to mid-June,rapidly increased in mid to last-July,and peaked in the mid to last-August in Xinjiang. Incidences were positively related to inoculum density and virulence of the V. dahliae.【Conclusion】The studies suggested that the seasonal dynamic of cotton Verticillium dahlia in Shihezi cotton area,and the severity of disease was closely related with the quantity of primary infection and the virulence of strains V. dahliae.

关 键 词：棉花 黄萎病 时间动态 发病与菌量和菌株致病性关系 

分 类 号：S435.621[农业科学—农业昆虫与害虫防治]