In general, the concentration of potassium dihydrogen phosphate mixed into the air when spraying drugs on airplanes is about 10- 100g/ mu. Add about100g of potassium dihydrogen phosphate to an acre of land, and the specific concentration to be used needs to be determined according to the specific situation and pesticide use guidelines. When using potassium dihydrogen phosphate, we should also abide by the regulations and technical standards for pesticide use to ensure safety and effectiveness.