Summer is a period of high incidence of cucumber bacterial keratoses. The disease mainly invades cucumber leaves, melon strips, stem vines and other parts. Reduce humidity and prevent disease. The disease is prone to occur when the temperature is 18°C-26°C and relative humidity is 70% or more. Cucumber in open field can take measures to reduce the humidity in the field and avoid or delay the occurrence of disease. For poorly ventilated plots, the planting density should be appropriately reduced. Before entering the rainy season, low-lying land should be prepared for flood prevention and drainage. To moderate pruning and improve ventilation conditions in the field. Spray the medicine in time. In the case of bacterial keratoses alone, they can be sprayed with 77% of the WP 400-times or 72% of the streptomycin-soluble powder 4000-times. When bacterial leaf spot and downy mildew occur at the same time, use 47% Garnett WP 600-800 times or 60% EB aluminum wettable powder 500 times. To be used for rotation, pay attention to the safety interval of pesticides used. Anesthesia Medical Co., Ltd. , https://www.honestymed.com