First of all, it is necessary to know the type of crops to be controlled, as well as the area, terrain, pests and diseases, as well as the control cycle, and the type and type of pesticides used. These require the preparatory work to be done before the task is determined: whether the terrain survey is suitable for flying defense, whether the area measurement is accurate, and whether there is an unsuitable area for operation; report on farmland diseases and insect pests, and whether the control task is carried by the flying defense team or the farmer’s medicine.It is related to whether the farmers' pharmaceuticals are purchased independently or provided by local plant protection stations and other institutions.(Note: Because powder pesticides require a lot of water to dilute, and agricultural spraying uav save 90% of the water compared to manual labor, the powder cannot be completely diluted, and the use of powders will easily cause the agricultural spraying uav spraying system to be blocked and affect the operation efficiency. and control effect)

Pesticides are not only powders, but also water, suspending agents, emulsifiable concentrates and so on. These can be used normally, and it involves the length of the dispensing time. Since the operation efficiency of the plant protection drone is between 200-600 mu a day according to the terrain, it is necessary to formulate a large amount of drugs in advance, so large bottles of pesticides are generally used, or the flight defense service organization prepares the special drug for flight defense by itself, and saving the dispensing time is also the key to improving the operation efficiency.