What are the disadvantages and advantages of smoking?

A method of applying pesticides by dispersing smoke or fog carrying pesticides in the air. Smoke is dispersed in the gas phase in solid phase with a particle size of 0.5 ~ 5 microns, and fog is dispersed in the gas phase in liquid phase with a particle droplet diameter of1~ 30μ m. Because of the small particle size, smoke can be dispersed in space for a long time and contact with biological targets for a long time, and the contact efficiency is much higher than that of spray method and powder spraying method, which is close to fumigation method. Save labor and time, and do not need complicated instruments. The disadvantage is that it is greatly influenced by airflow and wind and is difficult to control. Therefore, the smoke method is mostly used in closed spaces and forests and orchards with high canopy density. The deposition of smoke particles on the target is similar to that of fog drops and powder particles, but the drift phenomenon is more serious, so the deposition efficiency is higher in a smaller target area. The outdoor use of aerosol should be carried out in the early morning or evening under the condition of inverse warming, so as to make the smoke close to the ground and improve the preventive effect.