【摘要】 报道了山东省近年来发生的一种新病害—冬枣黑斑病。该病在山东境内冬枣栽培区均有分布 ,主要危害叶片和果实 ,一般病果率在 3 0 %左右 ,感病重的枣园达 80 %以上 ;病原菌以菌丝在枣树牙鳞和皮痕内越冬 ,可通过伤口和自然孔口侵入 ,2 5℃下潜育期 7天左右 ;7月下旬、8月上旬为发病盛期 ;病害的发生与气候、树龄、枣园种植结构、昆虫危害等因子密切相关。更多还原

【Abstract】 A new disease -"Dongzao" jujuba black patch found in shandong province was reported. The disease existed where "Dongzao" jujuba was planted , which mainly harmed leaves and fruits. Average infected fruit rate was about 30% . more than 80% of Jujuba garden were diseased. The perula and bark scar were main hibernacles of Pathogenic fungi; Pathogenic fungi infected into by wounds and natural holes. The latent period was about 7 days in 25℃ . The disease was prevalent from last ten days of July to first ten days of August, which had more relevant to climate, tree ages, garden planting structure, and insect injuries.更多还原