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,发生于鄂西南山区的杜仲叶部病害主要有杜仲斑点病(Pyllosticta theaefoliaHara)、杜仲炭疽病(Colletotrichum gloeosporidesPenz.)、杜仲褐斑病(Cercospora.sp)和杜仲灰霉病(Botrytis cinerea Pers.ex Fr.)四种主要病害。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;在密度小、郁闭度小、干旱少雨季节,高海拔地区,寄主上部,对病原不利的环境发病轻。病害与坡向、地位、坡度的关系不显著。
The leaf disease of Eucommia ulmoides Oliv.was studied in the southwest mountainous area of Hubei province.The results show that the disease mainly include Pyllosticta theaefolia Hara、Colletotrichum gloeosporides Penz.、Cercospora.sp.and Botrytis cinerea Pers.ex Fr.Its invading period and incuration period is in the early and middle of April.The disease will express a symptom in the last ten days of April.The last ten days of May is the peak period of the disease,when it is hot and rainy.The occurrence degree and the management levels present negative relativity.The disease is severe under the circumstance of high density,great canopy density,hot and rainy season,low altitude and small perpendicular height.It is vice versa.The disease dose not have an obvious relation with the direction,position and tilt of the hillside.
出处
《武夷科学》
2005年第1期89-94,共6页
Wuyi Science Journal
关键词
杜仲
叶部病害
病原
发生规律
鄂西南
Eucommia ulmoides Oliv.
leaf disease,pathogeny
occurrence law
southwest of Hubei province
