Synergistic effect of different auxiliaries on pyraclostrobin in the prevention and control of powdery mildew of Rosa roxburghi
To investigate the synergistic effect of different auxiliaries with pyraclostrobin on the prevention and control of powdery mildew of Rosa roxburghii,the amino oligosaccharide,super bovine plant essential oil addi-tive and trichoderma combined with pyraclostrobin according to volume ratio of 1∶1 were tested in the field.Through the investigation of disease index,calculation of control effect,combined with the detection of rox-burgh rose fruit quality,the synergistic effect of different auxiliaries on the prevention and control of powdery mildew of roxburgh rose was analyzed.The results showed that on the 14th day after treatment,the control effect of 1,500 times solution of 30％pyraclostrobin suspension on powdery mildew of roxburgh rose was 89.12％,and the control effect of 30％pyrazoletin suspension+5％amino-oligosaccharide aqueous solution combination was 95.34％,showing a better control effect than that of other combinations.The contents of vi-tamin C,SOD,Al and Cu in the fruits of roxburgh rose were significantly increased,and the pesticide residues were reduced after the treatment with the combination of 30％pyraclostrobin suspension and 5％amino-oligo-saccharide aqueous solution in a volume ratio of 1∶1.The combination of 30％pyrazoletin suspension+5％a-mino-oligosaccharide aqueous solution in a volume ratio of 1∶1 could effectively control powdery mildew of rox-burgh rose,reduce the usage of chemical pesticides and improve the fruit quality.
pyraclostrobinpowdery mildew of Rosa roxburghiiauxiliariessynergismfruit quality
万方数据
维普
