摘要
菌核病菌在 2 0℃下菌丝生长速度最快 ,2 5℃、15℃次之 ,40℃为菌丝的致死温度。病菌在相对湿度 85 %以上的高湿下 8h,才能形成危害性的软腐斑 ,且随着高湿时间的延长 ,扩展斑增大。菌核病菌在全光照菌丝生长的最快。病菌在 3d~ 5 d菌龄能够侵染叶片 ,随着菌龄的增长 ,致病力变弱 ,8d以上的菌龄的菌丝基本上失去致病性。研究表明 ,5 0 %多菌灵 WP、5 0 %菌核净 WP、5 0 %异菌脲 WP、70 %农利灵 WP、70 %敌克松 WP、80 %苯菌灵
Hyphy of Sclerotinia sclerotiorum grew fastest at 20℃,then at 25℃ and 15℃.40℃ is the fatal high temperature.Under optimum temperature and highRH(above 85%)for 8 hours can lead to aggressively soften and rot lesions.With the time of high humidity elongated,the spread lesions enlarged.Mycelial of S.sclerotiorum grew fastest under full illuminance.The pathogen showed its better pathogenicity in 3~5 days after inoculating and lose pathogenicity after 8 days.The study showed that 50% Carbenclazol?50% Rovral?50% Ronilan?70% Diazoben?80% Benomge played a good role in inhibiting sclerotium blight caused by S.sclerotinia.
出处
《内蒙古农业大学学报(自然科学版)》
CAS
2001年第3期39-44,共6页
Journal of Inner Mongolia Agricultural University(Natural Science Edition)
基金
北京市自然科学基金重点项目 (60 0 1 0 0 2 )
关键词
菌核病
温度
湿度
光照
菌龄
抑菌效果
生物学特性
蔬菜
sclerotium blight
temperature
humidity
illuminance
hyphy age
inhibitory effect