How to treat Leaf Blight of muskmelon in greenhouse

The disease is a bacterial disease, which mainly harms leaves, petioles and young melons, and can be damaged during the whole growth period. At the seedling stage, the susceptible cotyledons showed water-immersed yellow sunken spots, the back of the leaves was light green water-immersed spots at the initial stage of the disease, and gradually turned into light brown necrotic spots, and the spots were brittle and perforated after drying. In order to prevent the disease, first of all, the diseased plants and remains should be removed and burned, and the acupoints should be disinfected with lime. Secondly, it is necessary to deeply plough the land, remove the sick and residual bodies in time, pay attention to ventilation and dehumidification, adopt high ridge cultivation, and strictly control agricultural operations such as pruning and binding vines in cloudy days with dew or wet conditions. In addition, seeds should be disinfected by soaking seeds in warm water. The seeds can be soaked in 55 ℃ warm water for 15 minutes, or treated with streptomycin sulfate 2 million units for 1-2 hours, then washed and sowed. Chemical control; prevention of bacterial diseases, the initial selection of 47% Jiarinong wettable powder 800 times solution or 77% can kill wettable powder 500 times solution, these can be mixed with fungal fungicides.