【摘要】 【目的】为筛选出能有效控制葡萄霜霉病菌的杀菌剂,并为生产中合理使用杀菌剂提供指导。【方法】采用离体叶盘保湿法,测定了3种不同类型杀菌剂对贺兰山东麓葡萄霜霉病菌的毒力。【结果】3种内吸性杀菌剂对贺兰山东麓葡萄霜霉病均有一定的抑制作用。其中烯酰吗啉的抑制活性远高于其他2种杀菌剂,其平均EC₅₀值仅为0.018 4μg/mL;霜脲氰的抑制活性稍弱,其平均EC₅₀值为0.085 6μg/mL;甲霜灵的抑菌效果最弱,其平均EC₅₀值为0.120 9μg/mL。【结论】98%烯酰吗啉对葡萄霜霉病的毒力最强,在连续降雨后喷施可以有效控制葡萄霜霉病的发生。更多还原

【Abstract】 [Aims] This study aims to screen out effective fungicides for control of grape downy mildewand provide reference for guiding the rational use of fungicides in production. [Methods] Toxicity of three kinds of fungicides collected from different areas at the eastern foot of Helan Mountain was determined by using leaf disc method. [Results] Three fungicides showed high antibacterial activity against grape downy mildew. The bacteriostatic activity of dimethomorph was higher than the other two fungicides, and the average EC₅₀ was 0.018 4 μg/mL; the bacteriostatic activity of permethasam was slightly weaker, and its average EC₅₀ was 0.085 6 μg/mL; the bacteriostatic effect of metalaxyl was poor, and its average EC₅₀ was 0.120 9 μg/mL.[Conclusions] Dimethomorph has very strong inhibiting effect on grape downy mildew and can be used as a temporary relief measure to control grape downy mildew when rainy days.更多还原