Co-toxicity and Effect of Mixtures of Fenaminstrobin and Difenoconazole Against Mycosphaerlla melonis of Watermelon

doi:10.11923/j.issn.2095-4050.cjas15090006

Abstract

Abstract: [Objective][Method] The toxicity of fenaminstrobin, difenoconazole and their mixtures were tested by toxic media method on Mycosphaerlla melonis, in order to determine the combined effect of the mixtures.[Result]The results showed that, the EC50 of the mixtures at the ratio of1:0, 0:1, 5:1, 3:1, 1:1, 1:3,1:5 were 17.6、0.22、0.68、0.63、0.35、0.28、0.26mg/L, respectively.And the co-toxicity were 182.70, 134.63, 124.16,104.33,101.29, respectively. Field efficacy tests showed that the control effect of 24% fenaminstrobin.difenoconazole SC to gummy stem blight from watermelon was better. Gummy stem blight from watermelon can be controlled well by spraying 24% fenaminstrobin.difenoconazole SC once the disease occurs at the concentration of 200-400 mg/L.[Conclusion] The mixtures at the ratio of 5:1, 3:1 and 1:1 have synergism on Mycosphaerlla melonis, and the ratio of 1:3 and 1:5 have additive action. 24% fenaminstrobin and difenoconazole SC can be applied to control gummy stem blight in practical production.

CLC Number:

TQ450

茹李军,,,, and . Co-toxicity and Effect of Mixtures of Fenaminstrobin and Difenoconazole Against Mycosphaerlla melonis of Watermelon[J]. Journal of Agriculture, 2016, 6(5): 28-32.

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