Pesticides are used to prevent, eliminate or control diseases, insects, grasses and other harmful organisms harmful to agriculture and forestry, as well as to regulate the growth of plants and insects in a purposeful manner, either chemically synthesized or derived from biological or other natural substances, a substance or a mixture of substances and their preparations. Broadly speaking, pesticides are divided into crop protection pesticides and non-crop protection pesticides, crop protection pesticides are mainly divided into herbicides, insecticides, fungicides and plant growth regulators, etc., which are mainly used in agricultural protection; non-crop protection pesticides mainly include rodenticides, insect repellents, health mosquito supplies, etc., which are mainly used in residential medicine, public health, forestry management, industrial mold, pest control, seasonal medicine, wood preservation, lawn preservation, and so on. It is mainly used in residential medicine, public health, forestry management, industrial mold control, pest control, seasonal medicine, wood preservation, lawn protection and other fields.