几种杀菌剂对草莓白粉病的防效研究

在温室大棚用苯醚甲环唑、苯醚甲环唑+丙环唑、氟硅唑、腈菌唑和三唑酮等杀菌剂防治草莓白粉病Sphaerotheca aphanis。结果表明,适宜浓度的 10%苯醚甲环唑WG、30%苯醚甲环唑+丙环唑EC、40%氟硅唑EC、20%三唑酮EC、12.5%腈菌唑EC的田间防治效果均可达到80%以上;苯醚甲环唑、苯醚甲环唑+丙环唑、氟硅唑和三唑酮的持效期约为18 d,而腈菌唑的持效期较短,约为7 d。10%苯醚甲环唑WG在360~900 g/hm2用量时不影响草莓长势,而氟硅唑225 mL/hm2和三唑酮300~450 mL/hm2用量时则在不同程度上抑制草莓的生长。

Primary Study of Effect of Several Fungicides against Sphaerotheca aphanis on Strawberry

In greenhouse Sphaerotheca aphanis which causes strawberry powdery mildew was controlled by fungicides such as 10% difenoconazole WG,30% difenoconazole + propiconazole EC,40% flusilazole EC,20% triadimefonand EC and 12.5% myclobutanil EC. It was shown that the effect of five fungicides in suitable concentration was above 80% and the period of protection of difenoconazole,difenoconazole + propiconazole, flusilazole and triadimefon and was about 18 days, while that of myclobutanil was 7 days. The growth of strawberry wasn’t inhibited by difenoconazole, while it was inhibited by flusilazole and triadimefon to certain extent.