The sprayer is a kind of agricultural machinery that disperses liquid, and it is a kind of agricultural pesticide application machinery. The plant protection machinery in agricultural machinery belongs to portable agricultural machinery. It is also called high stem crop sprayer or field bath sprayer. Sprayer [suitable for pest control in forests, nurseries, orchards, tea gardens, cotton, wheat, rice, corn and other field crops and large-scale pastures, garden flowers and trees in cities and suburbs, vegetable gardens, and plants in greenhouses. Prevention and treatment. The smaller the particle size of the smoke, the more the number of fog particles. Experiments have shown that the more fog particles per unit area, the better the control effect. A large number of mist particles diffuse in the space and distribute evenly, which greatly increases the chance of contact with germs and pests, and is beneficial to improve the control effect. The smoke particles are small and have multi-directional deposition characteristics. It is beneficial for the fog particles to deposit on the front and back of the branches and leaves and in all directions of the insect body. The deposition rate is higher on small targets, such as insect antennae and hairs. This is the effect of pest control. One of the good reasons.