11种杀菌剂对设施草莓白粉病的防治效果

为了筛选出防治设施草莓白粉病的高效杀菌剂，选择11种杀菌剂结合清除病残体进行田间药效试验，以期为大田草莓白粉病防治提供参考依据。试验结果表明：在清除病残体的情况下，不同杀菌剂对草莓白粉病均有一定程度的抑制作用，其中25%乙嘧酚磺酸酯微乳剂在3次用药后防效逐渐增加，至第3次药后7 d在所有药剂中防效最好，达到79.90%;66.8%嘧霉胺悬浮剂药效的速效性和持续性好，在第1、2次施药后7 d防效均为第1，均显著高于其他处理；丙烯酸酯类杀菌剂25%乙嘧酚悬浮剂表现出良好的速效性和持续性，前2次施药后7 d防治效果均在70%以上，显著高于除66.8%嘧霉胺悬浮剂以外的其他药剂处理；除30%氟菌唑可湿性粉剂有轻微药害产生，其余各供试药剂按照试验浓度施药，草莓生长安全、无药害产生。

Control Effects of 11 Fungicides on Strawberry Powdery Mildew

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.