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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 results showed that the diseases of Eucommia ulmoides were Pyllosticta theaefoliaHara, Colletotrichum gloeosporidesPenz., Cercospora sp. And Botrytis cinereaPers.ex Fr. is the main leaf disease in the area. Disease invasion and incubation period in mid-April, low-altitude areas in mid to late symptoms appear in mid-late May, the hot and rainy season for the peak incidence. The incidence of disease is negatively correlated with the operating level. Large density, canopy density, high temperature and rainy season, low altitude, the lower part of the host and the pathogen beneficial environment serious disease, on the contrary light. The relationship between disease and aspect, slope position and slope is not significant.