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| Synergistic Effect of Mixing Kresoxim-methyl with Difenoconazole to Control Sphaerotheca aphanis |
| ZHU Wei-gang，HU Wei-qun，ZHANG Rui-rui，CHEN Jie* |
| Zhejiang Research Institute of Chemical Industry，National Center for Research and Development of Pesticide at Zhejiang Base，Hangzhou 310023，Zhejiang，China |
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Abstract Kresoxim-methyl is one of the new fungicides commonly used for controlling strawberry powdery mildew．In order to select mixture of kresoxim-methyl with difenoconazole of synergistic control effect against strawberry powdery mildew，we screened by pot experiment Sphaerotheca aphanis among fungicide mixtures．The results showed that CTC values of the mixtures with the mixing ratio of Kresoxim-methyl and difenoconazole as 1∶1，1∶3，1∶5，1∶7，1∶9 were 157.91，121.83，116.65，114.07 and 108.08，respectively．The results also showed that the 2 ratios among the 5 as 1∶1 and 1∶3 to Sphaerotheca aphanis had obviously synergistic effect，and the rest 3 had additive effect．Among the 5 matching ratios，1∶1 ratio had the best effect，both from the synergistic effect and the control effect.
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Received: 30 November 2011
Published: 09 January 2012
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