Prevention and control measures: 1. Strengthen seedling management, cultivate strong seedlings, and timely prevent and control pests and diseases; 2. Strengthen greenhouse warming and warming work, pay attention to insulation when the cold current arrives, and pay attention not to water at this time, so as not to reduce the soil temperature; Fast-acting fertilizers, mostly applied organic fertilizers, and top dressings outside the roots. Top dressings can be sprayed with high-efficiency phytochemicals, composite potassium dihydrogen phosphate, sprayed treasure, plant AAA and other foliar fertilizers; 4. After rain, fine At the time, the sheds should expel the grasshoppers, cover the sides, and remove the old leaves in time to reduce the transpiration. 5. Water, fertilize, and spray pesticides in time after sunny days to promote seedling emergence and disease prevention. It is advisable to drip irrigation to avoid flooding and maintain good air permeability.
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