There are many varieties of herbicides, and one variety is often produced by many manufacturers. The names of the products are varied, and many drugs are easily misused. This requires the majority of farmers to be clear when purchasing, whether it is a dryland herbicide or a herbicide in rice fields. If a dry field herbicide such as "alachlor" is used as a butylamine in rice fields, the word will be out of production. Therefore, the selection of herbicides should not only pay attention to the name, identify the three certificates, but also pay attention to similar types of outer packaging, similar names of fake and inferior pesticides, misleading consumers to use, causing phytotoxicity.