Control methods: chemical control. 1, early prevention. In the 4 to 5 leaf stage of maize, spraying with 25% triadimefon 1000 times or 25% tebuconazole 1500 times per acre can prevent the occurrence of corn brown spot. 2, timely prevention and treatment. Immediately after the onset of corn, spray 25% of triadimefon(triazole copper) wettable powder 1500 times on the stems and leaves or use fungicides to spray. In order to improve the control effect, some foliar fertilizers, such as potassium dihydrogen phosphate, etc., may be added to the liquid medicine, and the combination of topdressing available fertilizers can control the spread of diseases and promote the robustness of corn and increase the disease resistance of corn. According to the current rainy weather characteristics, spraying bactericide should be 2 to 3 times, about 7 days apart, the following rain should be added after 6 hours. Air Filled Flood Tube,Air Inflated Flood Tube,Air Filled Water Gate,Tube Water Barrier Denilco Environmental technology(Suzhou)Co., Ltd. , https://www.wflood.com