This product is a mixture of Metalaxyl and Mancozeb in a certain proportion. Metalaxyl is a systemic bactericidal ingredient with protective and therapeutic effects, which can absorb and conduct various parts of the plant body to kill germs in the body. Mancozeb can form a protective film on the surface of plants to prevent the invasion of pathogens. The double protective effect of the compound preparation has the root number of the disease prevention effect, and the bacteria are not easy to produce drug resistance.