摘要
通过连续3年的病果致病菌分离和病原菌回接试验,结果证明,引起枣果实黑斑病的致病菌是Alternaria tenuissima(Fr)Wiltsh和Alternaria sp,属弱寄生菌;由于使用GA增加产量,降低了叶果比,果实营养不良导致免疫力下降是黑斑病发生的内因;8月下旬多雨引起的果实生理紊乱症(皱胴病)是黑斑病发生的重要诱因;成熟期遇雨是黑斑病发生的必要条件。
After three-year tests on separation of pathogenic fungus in diseased jujube fruits and field-inoculation of fungi separated, Alternaria tenuissima （Fr） Wiltsh and Alternaria sp are classified as the fungi which may cause jujube black spot, and they are weak parasitic fungi. Because of the use of GA to increase yield, the ratio of leaves to fruit is reduced, and the innutrition of fruits results in descent of immunity, which is beheved the internal factor of black spot. It is concluded that the bottom-crinkle of jujube, a disease of physiological disorder resulted from the rain during later August, is an important inducing factor for black spot. Rain during the maturing period is necessary condition for the black spot.
出处
《山西农业科学》
2009年第11期37-40,共4页
Journal of Shanxi Agricultural Sciences
基金
山西省科技攻关项目(041037)
关键词
枣黑斑病
枣黑腐病
枣皱胴病
Jujube black spot
Jujube black rot
Bottom-crinkle of jujube
