Summer is the high incidence of bacterial bacterial leaf spot disease in cucumber. The disease mainly invades cucumber leaves, melon strips, stems, and other parts. The damage symptoms on the leaves are similar to those of downy mildew, and measures should be taken as soon as possible. Symptoms Cucumber Bacterial spotted cucumbers appear as oil-immersed, light green spots on the leaves, and then expand into polygonal yellow-brown spots. They then turn gray and white, easily perforated, and there are white spots on the back of the lesions when the humidity is high. Bacterial pus; When the melon is infected, the primary water is immersed in dark green patches. After the expansion, the lesions are connected to each other. The later lesions are gray and white. When the humidity is high, the diseased department has white pyomero; the lesions on the stems and the melon strips. Similar. Cucumber downy mildew also occurs in the leaves of the polygon brown spots, the two diseases are not easy to distinguish, you can pick 1 ~ 2 diseased leaves, wash with water, put in a clean plastic bag, sealed in the temperature Appropriate for 24 to 48 hours, view the lesions in the back of the leaves, such as the emergence of white bacteria pus for bacterial leaf spot disease, such as the emergence of black mold layer is downy mildew; sometimes, some lesions have white bacteria pus, Some have black mold layer, it means that the field of bacterial leaf spot disease and downy mildew at the same time. Control measures Cucumber Bacterial leaf spot disease is caused by bacteria that invade plants from wounds or water holes. Therefore, attention should be paid to reduce wounds in field management, and diseased leaves and diseased fruits should be promptly removed to bring them out of fields and buried or burned. . In the case of bacteriological angular spot disease in the field, it is possible to use 50% ceric acid copper WP wettable powder 500 times, or 14% urea ammoniacal water bath 300 times, or 77% copper hydroxide wettable powder 400 times. Or 72% of agricultural streptomycin sulfate soluble powder 4000 times spray control. When bacterial leaf spot and downy mildew occur at the same time, it can be controlled by 47% spring thunder-copper WP, 50% sulphouric copper wettable powder and water spray. Note that the spray should be uniform and the back of the blade should be sprayed. After the hailstorm in summer, the plants will have a lot of wounds. In order to avoid the invasion of bacteria, all fields should be sprayed in time. Amino Acids,Taurine Powder,L Glutamic Acid,Magnesium Stearate Powder Guangzhou ZIO Chemical Co.,Ltd. , https://www.ziofoodchemical.com