Cruciferous vegetable crop clubroot control agent and application thereof

The invention belongs to the field of agricultural fungicides, and particularly relates to a cruciferous vegetable crop clubroot control agent which comprises an active component A and an active component B. The active component A is azalomycin F3 or azalomycin F4, and the active component B is isotianil. The mass ratio of the active component A to the active component B is (15: 1)-(1: 5). The prevention and treatment agent has an excellent prevention and treatment effect on clubroot of brassicaceous vegetable crops, has a remarkable synergistic interaction effect on clubroot, can effectively reduce the use dosage of a single agent, and slows down the generation of drug resistance of diseases. 本发明属于农用杀菌剂领域，具体为一种十字花科蔬菜作物根肿病防治药剂，包含活性成分A和活性成分B，其中活性成分A为阿扎霉素F3或者阿扎霉素F4，活性成分B为异噻菌胺；活性成分A与活性成分B的质量配比为15:1-1:5。本发明的防治药剂对十字花科蔬菜作物根肿病具有优异的防治效果，对根肿病表现为显著的协同增效作用，可以有效减低单剂的使用剂量，并减缓病害抗药性的产生。