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黄瓜黑星病自1983年首先在我省牡丹江市郊区发生以来,发生面积逐年扩大,全省已有十个市程度不同的发生危害。主要危害大棚黄瓜,其次危害露地黄瓜,一般病瓜率20—30%,严重病瓜率90—100%,使商品黄瓜失去食用价值,减产减收严重,影响市场供应。从1983年开始对该病在田问危害的症状,流行规律和防治技术进行了一系列的调查研究。该病主要危害瓜条,其次危害叶片、茎、卷须等,在黄瓜整个生育期均可危害。黄瓜黑星病发病条件,与温湿关系极为密切,棚温20
Since the first occurrence of cucumber scab in 1983 in the suburbs of Mudanjiang in our province, the area has been expanding year by year. Ten provinces and cities in the province have had different degrees of harm. Mainly harmful to greenhouse cucumbers, followed by the hazards of exposed cucumbers, the general disease rate of 20-30%, severe disease rate of 90-100%, so that the loss of food value of cucumber, cut serious losses affect the market supply. Since 1983, a series of investigations have been conducted on the symptoms, epidemic laws and prevention and control technologies of the disease in the field. The disease endangered melon, followed by the hazards of leaves, stems, tendrils, etc., can be harmful throughout the growth of cucumber. Cucumber scab disease conditions, and very close relationship between temperature and humidity, shed temperature 20