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哈密瓜叶枯病是我国哈密瓜生产中的新病害,一般发病率80—100％,病情指数30—100,直接危害着哈密瓜的生产。该病以为害叶片为主,造成叶斑,严重者可使叶片枯焦。经鉴定该病系Alternaria cucumerina侵染所致,该菌主要在病残内越冬,以分生孢子侵染寄主,发病适温25—33℃,潜育期3—4天,借气流传播,一般7月中旬至8月中旬雨水次数多或灌水多,病害最为猖獗。作者对该菌的寄主范围、病害发生发展规律、药剂筛选、防治都作了研究,且提出调查与分级的新方法。采用综合防治措施,严格控制浇水,发病初期选喷退菌特、波尔多液、代森锰锌等杀菌剂,经大面积生产应用,只要及时周到,可收到显著效果。
Hami melon leaf blight is a new disease in the production of Hami melon in China, the general incidence of 80-100%, disease index 30-100, directly endanger the production of melon. The disease is the main damage to leaves, resulting in leaf spots, severe leaves can be scorched. The disease was identified by the Alternaria cucumerina infection caused by the bacteria mainly in the winter and sick residual to conidia host infection prevalence temperature 25-33 ℃, 3-4 days incubation period, by air flow, the general From mid-July to mid-August, there was more rain or more irrigation and the disease was most rampant. The author of the bacteria host range, disease development and development, drug screening, prevention and treatment have been studied, and put forward new methods of investigation and grading. The use of integrated control measures, strict control of watering, the early onset of aniline injection Termitomycin, Bordeaux mixture, mancozeb and other fungicides, the production and application of large area, as long as timely and thoughtful, you can receive significant results.