3种药剂对草莓白粉病的防效评价

通过盆栽试验和大田试验,测定了42.5%吡唑醚菌酯·氟唑菌酰胺SC(2000、3000、4000倍液)、30%氟菌唑WP(2000、2400、3000倍液)和50%醚菌酯WG(2000、3500、5000倍液)3种药剂对草莓白粉病的防治效果。结果表明:盆栽药效试验中,42.5%吡唑醚菌酯·氟唑菌酰胺SC2000倍液对草莓叶片白粉病的防效为90.81%,显著高于其他处理;30%氟菌唑WP最高防效为85.58%;50%醚菌酯WG最高防效为76.21%。大田试验中,42.5%吡唑醚菌酯·氟唑菌酰胺SC2000倍液对草莓叶片和果实白粉病的防效也最高,分别为98.20%和67.49%;30%氟菌唑WP最高防效分别为74.72%和60.78%;50%醚菌酯WG最高防效分别为76.00%和49.01%。3种药剂对草莓白粉病均具有不同程度的防效,对叶片白粉病的防治效果好于果实白粉病害,且试验浓度条件下无药害产生。

Evaluation of Three Fungicides Control Efficacy on Strawberry Powdery Mildew

In order to evaluate the efficacy of 3 fungicides at different concentrations on strawberry powdery
mildew（Sphaerotheca aphanis），pot experiment and field trials were performed in the current study．The
results of pot experiment showed that 42.5% Pyraclostrobin·Fluxapyroxad SC diluted for 2 000 times showed the
highest control efficacy on strawberry powdery mildew occurring on the leaves，and its control efficacy reached
90.81%，significantly higher than that of the other treatments．The control efficacy of 30% Triflumizole WP and
50% Kresoxim-methyl WG in pot experiment were 85.58% and 76.21%，respectively．In the field trials，42.5%
Pyraclostrobin·Fluxapyroxad SC diluted for 2 000 times produced the best efficacy against strawberry powdery
mildew on leaves and fruits．Their control rates were 98.20% and 67.49%， respectively．While，the best control
efficacy of 30% Triflumizole WP were 74.72% and 60.78%， respectively．The best control efficacy of 50%
kresoxim-methyl WG were 76.00% and 49.01%，respectively．Therefore，these 3 fungicides showed different
efficacities against strawberry powdery mildew and all had no injury，all these 3 fungicides produced better efficacy
on strawberry powdery mildew occurring at leaves than on fruits．