Bactericidal composition for preventing and treating root rot

The invention provides a bactericidal composition for preventing and treating root rot, the active ingredients of the bactericidal composition comprise pyraclostrobin, fludioxonil and metalaxyl-M, and the mass ratio of pyraclostrobin to fludioxonil to metalaxyl-M is 7: 2: 3. The composition has a remarkable synergistic effect, the use dosage of the active ingredients can be effectively reduced, and generation of drug resistance of diseases is effectively relieved. 本发明提供了一种用于根腐病防治的杀菌组合物，活性成分由吡唑醚菌酯、咯菌腈和精甲霜灵组成，吡唑醚菌酯、咯菌腈和精甲霜灵的质量配比为7：2：3。组合物具有显著的增效作用，可以有效减低活性成分的使用剂量，有效减缓病害抗药性的产生。