黄瓜霜霉病是黄瓜最普遍和最严重的病害之一,在黄瓜整个生育期都可发生,主要危害叶片。浏阳市各地都有发生,流行年份受害地块减产20%~30%,严重时达50%以上。2006年用72%代森锰锌.霜脲氰WP进行了黄瓜霜霉病田间药效试验,结果表明:667 m2用100 g、133.3 g、166.7 g,分别施药3次,防治效果分别为43.59%、51.00%、57.15%。增产率分别为4.49%、9.90%、15.03%。 Cucumber downy mildew is one of the most common and serious cucumber diseases and can occur throughout the growth period of cucumbers, with the major hazards to the leaves. Liuyang City, have occurred throughout the year, the victims of the epidemic years of land cut 20% to 30%, in serious cases up to 50%. In 2006, the efficacy test of cucumber downy mildew with 72% mancozeb and urea-urea-urea WP was carried out. The results showed that 667 m2 were applied three times with 100 g, 133.3 g and 166.7 g respectively, and the control effects were 43.59%, 51.00%, 57.15%. Yields were 4.49%, 9.90%, 15.03% respectively.