The Effect Test of Five Fungicides to Control Powdery Mildew in Jianbao Pumpkin

In order to screen effective fungicides to control powdery mildew in pumpkin, five fungicides were selected for the efficacy test. The results showed that 1500 times solution of 25% acetylsulfonate EC, 1000 times solution of 12.5% myclobutanil EC and 1000 times solution of 12% benzyl-flutolanil SC all had better effect on pumpkin powdery mildew, among which 25% acetylsulfonate had the best effect, the control effects of 7 and 14 days after the third injection were 82.8% and 86.5% respectively. All the three fungicides could be widely used in the control of pumpkin powdery mildew.