Study on the Control Effects of 75％Trifloxystrobin-Tebuconazole on the Sunflower Sclerotiniose
The indoor virulence test of 75％trifloxystrobin·tebuconazole on Sclerotinia sclerotiorum and the field control effect of Sclerotinia were studied by indoor in vitro determination and field experiment.The results showed that 75％trifloxystrobin·tebuconazole had a good inhibitory effects on S.sclerotiorum,and the EC50 was 0.0370 μg/mL.It had a good field control effects on sunflower Sclerotiniose,and had the best control effect at 450 g/ha,with a control effects of 92.78％.The control effects in the flowering period was better than that in other periods;Moreover,the prevention effects of spraying once at the bud period,flowering period,full bloom,and the late flowering period was the best,and it had obvious increasing effects in yield.The production results showed that the yield of 75％trifloxystrobin·tebuconazole sprayed four times was significantly higher than those of the CK and the isobacterium fluridamine treatments,and the yield increased by 170.62％and 128.79％,respectively.
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