Bactericidal composition for preventing and treating white rust of sunflowers and application of bactericidal composition

The invention discloses a bactericidal composition for preventing and treating sunflower white rust and application of the bactericidal composition. The bactericidal composition is prepared from the following active ingredients: bacillus amyloliquefaciens and rhodovulum sulfidophilum, the two effective components in the bactericidal composition are compounded, so that the bactericidal composition has a remarkable synergistic effect, and has an excellent prevention and treatment effect on sunflower white rust caused by infection of apex pittosporum white rust fungi. And the dosage of the bactericidal composition is small, so that the dosage of chemical pesticides can be reduced, and the pollution to the environment is reduced. 本发明公开了一种用于防治向日葵白锈病的杀菌组合物及其应用，所述杀菌组合物的有效成分由解淀粉芽孢杆菌和嗜硫小红卵菌组成；该杀菌组合物中的两种有效成分复配具有显著的增效作用，对尖药草白锈菌浸染引起的向日葵白锈病具有极佳的防治效果。并且该杀菌组合物的用量少，可减少化学农药的使用量，减少对环境的污染。