Bactericide composition for preventing and treating soybean root rot disease

The invention discloses a bactericide composition containing tetraconazole and metalaxyl-M, wherein the bactericide composition comprises the following active components of tetraconazole and metalaxyl-M at the ratio of (1 to 20)-(20 to 1); and the mass percentage of the active components in the composition is 1%-80%. The bactericide composition can be prepared into a seed coating, and can also be processed into missible oil, a suspending agent, a water dispersible granule, wettable powder and an emulsion in water. The bactericide composition disclosed by the invention has the high bactericidal activity; meanwhile, the production and the development of the drug resistance of pathogens can be delayed; the use amount for prevention and treatment in practical production is reduced; and the bactericide composition is economic, efficient, safe and environmentally-friendly, has relatively high prevention and treatment effects on a plurality of kinds of crop diseases caused by fusarium and phytophthora, and especially has significant prevention and treatment effects on the soybean root rot disease.