| Abstract: To screen out high effective fungicides of controlling strawberry powdery mildew in facilities, 11 fungicides were selected to conduct fi eld effi cacy tests in combination with the elimination of disease residues to provide reference for controlling strawberry powdery mildew in field. The results showed that in case of elimination of disease residues, different fungicides had a certain inhibitory effect on strawberry powdery mildew, among which the effect of 25% ethylphenol sulfonate microemulsion increased gradually after the third dose, and the control effect was the best among all the fungicides during 7 d after the third dose, reaching 79.90%. 66.8% pyrimethanil suspension had good effi cacy and persistence, and the control effects ranked fi rst during 7 d after the fi rst and second application, which were signifi cantly higher than other treatments. Acrylate-based fungicide 25% ethyl pyrimethanil suspension showed good effi cacy and persistence, and the control effect was more than 70% after the fi rst two treatments during 7 days, which was signifi cantly higher than other treatments except 66.8% pyrimethanil suspension. All the test fungicides were applied according to the test concentration, the strawberry
will grow safely without harm, except that 30% fl uconazole wettable powder had slight harm. |