摘要
在土表、田边草丛和室内纸盒中的病残体上越冬的西瓜叶枯病菌（Ａｌｔｅｒｎａｒｉａｃｕｃ－ｕｍｅｒｉｎａＥｌ．ｅｔＥｖ．），次年均有传病作用；在稻田水中和稻田泥下５～１０ｃｍ处的病菌，３个月内失去传病力；旱地土下５～１０ｃｍ处的病菌，经３～６个月也相继失去传病力；旱地土表和田边草丛中的则需６～１５个月失去存活力。
The pathogen of watermelon leaf blight (Alternaria cucumerina Ell. et Ev.)overwintering in the crop residues laying on ground or among weeds near watermelon field or on the kraft box in the room would have capacity causing the disease in the coming year. The residues with the pathogen that were put into water and soil in rice field as deep as 5～10cm would lose their infection ability in 3 months, and those into dried soil 5～10cm deep gradually in 3～6 months,but those laying on ground or among weeds near watermelon field for about 6～15 months. The dying process of the dormant pathogen could be expedited by the Trichoderma sp.
出处
《中国蔬菜》
北大核心
1996年第6期27-30,共4页
China Vegetables
关键词
西瓜叶枯病
病菌
存活力
传病作用
Leaf blight of watermelon, Survival, infectivity
