摘要
采用标准地法对鄂西南山区杜仲叶部病害进行了详细的调查研究,结果表明,杜仲斑点病Pyllosticta theaefoliaHara、杜仲炭疽病Colletotrichum gloeosporidesPenz.、杜仲褐斑病Cercosporasp.和杜仲灰霉病Botrytis cinereaPers.ex Fr.是该区主要叶部病害。病害侵入期和潜育期在4月上中旬,在低海拔地区4月中下旬表现出症状,5月中下旬高温多雨季节为发病高峰期。病害的发生程度与经营水平呈负相关性。在密度大、郁闭度大、高温多雨季节、低海拔、寄主中下部以及对病原有利的环境发病严重,反之发病轻。病害与坡向、坡位、坡度的关系不显著。
The leaf diseases of Eucommia ulmoides Oliv. in the southwest mountainous area of Hubei Province were investigated using the way of sample plot. The result showed that the important diseases were Pyllosticta theaefolia Hara、Colletotrichum gloeosporides Penz.、Cercospora. sp. and Botrytis cinerea Pers. ex Fr. The infection period and incubation period were in the first and middle ten days of April. The symptom appeared in the last ten days of April. The last ten days of May was the peak period of the occurrence of diseases when it was hot and rainy. The occurrence degree and the management levels were negative relative. The disease were severe under the circumstance of high density, great canopy density, hot and rainy season,low altitude and small perpendicular height. The diseases had not an obvious relation with the direction, position and tilt of the hillside.
出处
《中国森林病虫》
北大核心
2006年第4期4-7,共4页
Forest Pest and Disease
关键词
杜仲
叶部病害
病原
发生规律
Eucommia ulmoides Oliv.
leaf disease
pathogen
occurrence regularity
