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近年来,随着保护地内蔬菜病害种类的增多,黄瓜细菌病害在我省一些地区的发生和危害日趋严重,而且又多与真菌病害同时发生,两者极易混淆。1990年沈阳市于洪乡农民张士林把细菌性角斑病误作为霜霉病防治,结果整棚黄瓜叶子变黄,减产惨重。所以生产中要做到准确及时防治关键还在于正确识别。1 识别目前黄瓜细菌性病害在我省主要有细菌性角斑病、细菌性缘枯病和细菌性斑点病三种。1.1 黄瓜细菌性角斑病是由丁香假单胞杆菌引起,主要为害叶片和瓜条。其症状是:子叶受害时初呈水浸状、近圆形凹陷斑,后微带黄褐色。真叶受害时初呈鲜绿色水浸
In recent years, with the increase of the types of vegetable diseases in the protected areas, the occurrence and damage of cucumber bacterial diseases in some areas of our province are becoming more and more serious, and more often occur simultaneously with fungal diseases, making the two easily confused. In 1990, Zhang Shilin, a farmer from Yuhong Township, Shenyang City, mistook bacterial angular leaf spot for downy mildew prevention and cure. As a result, the entire shed cucumber leaf turned yellow and output was heavy. Therefore, production should be accurate and timely prevention and control key lies in the correct identification. 1 identify the current cucumber bacterial diseases in our province mainly bacterial angular leaf spot, bacterial leaf blight and bacterial spot disease three. 1.1 Cucumber bacterial angular leaf disease is caused by the genus Pseudomonas syringae, the main damage to the leaves and melon. The symptoms are: early cotyledon victims were flooded, nearly circular depression spot, microstrip yellowish brown. True leaves at the beginning was fresh green water immersion