Melon downy mildew prevention and treatment method suitable for broad irrigation and drop irrigation

The invention relates to a melon downy mildew prevention and treatment method suitable for broad irrigation and drop irrigation. By combining a plurality of measures including soil improvement, agricultural prevention and treatment, biological control, chemical prevention and control and the like, melon downy mildew is prevented from occurring; meanwhile, air humidity is reduced by controlling soil surface humidity through drip irrigation under plastic film technology; and measures including in-advance prevention before rainy day/wet weather or broad irrigation, in-advance prevention flower and fruit periods and the like are adopted, so that the melon downy mildew completely does not occur or occurs rarely. The method provided by the invention is simple and easy to understand; the production habit of melon farmers is met and blind pesticide utilization is improved; dangers to the downy mildew in a melon cultivation process can be effectively inhibited and reduced; the use amount of chemical pesticides and the