Pictures and control methods of cucumber bacterial angular spot disease

Summer is the high incidence of bacterial bacterial leaf spot disease in cucumber. Cucumber bacterial angular leaf spot is one of the important diseases on cucumber. Often mixed in the field with cucumber downy mildew, the lesions are relatively close, sometimes confusing, but in the early stage of cucumber downy mildew, several polygonal water-stained lesions are produced on the back of the leaves, while bacterial angular spots are on the back of the leaves. Produces acicular water-stained lesions, often with dozens of lesions occurring simultaneously.

There is no rapid downy mildew in the disease, and there is no serious downy mildew on cucumber growth. The disease is mainly infused with cucumber leaves, melons, stems and other parts. Dehumidification and disease prevention. The disease is prone to occur when the temperature is between 18 ° C and 26 ° C and the relative humidity is above 70%. Open field cucumbers can take measures to reduce the humidity in the field and avoid or delay the occurrence of diseases. For plots with poor ventilation, the planting density should be appropriately reduced.

Before entering the rainy season, low-lying plots should be prepared for flood control and drainage. It is necessary to properly pruning the leaves and improve the ventilation conditions in the field. When bacterial keratosis occurs alone, it can be sprayed with 77% of the wettable microgranules 400 times solution or 72% of the agricultural streptomycin soluble powder 4000 times solution. When bacterial keratosis and downy mildew occur simultaneously, 47% of ruthenium WP can be used 600-800 times or 60% of ethyl phosphide WP 500 times.

This article URL: Cucumber bacterial angular spot picture and prevention measures

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