Shielding of Drifting Pesticide Particles by Electrostatic Pesticide Spraying and Grounded Conducting Net for Compliance with Positive List System

摘要

It is well known that electrostatic pesticide spraying (EPS) is effective to improve the adhesion performance of pesticide to agricultural crops. On May 29, 2006 the Ministry of Health, Labour and Welfare introduced the positive list system for agricultural chemicals remaining in foods. The system prohibits the distribution of foods that contain agricultural chemicals, such as pesticides, above a certain level if maximum residue limits have not been established. Because of this, pesticides should be sprayed only on the target plants. Also, the drifting pesticide particles should be shielded not to reach the other plants. In this paper, we show that charged droplets can be shielded by using grounded conducting net. EPS is also effective to prevent drift hazard of pesticides.