The disease is a bacterial disease that mainly damages the leaves, petioles, and young melons, and can be harmed throughout the growing period. The cotyledons in the seedling stage showed water-soaked yellow sag spots. The leaves at the early stage of the leaves were light green and immersed in spots. The leaves gradually turned into light brown necrotic lesions. After the drying, the lesions were brittle and perforated. To prevent the disease, we must first remove the diseased plant and the diseased body and burn it. The diseased cavities should be disinfected with lime. Secondly, the land should be ploughed deeply to remove the diseased body in time, pay attention to air release and humidity removal, use high-ridge cultivation, and strictly control the agricultural operations such as dew or wet pruning and vines under cloudy conditions. In addition, seeds should be sterilized by soaking in warm water. It can be soaked in warm water of 55°C for 15 minutes, or treated with 2 million units of streptomycin sulfate for 1 to 2 hours, then washed and sowed. Chemical control; Prevention of bacterial diseases, the initial selection of 47% Garnett WP 800 times or 77% to kill WP 500 times, these can be mixed with fungal fungicides.
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