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Effect of epoxiconazole on rice blast and rice grain yield in China |
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| Authors: | Yu Chen Jian Yao Wen-Xiang Wang Tong-Chun Gao Xue Yang Ai-Fang Zhang |
| Institution: | 1. Institute of Plant Protection and Agro-products Safety, Anhui Academy of Agricultural Sciences, Hefei, 230031, China 3. Scientific Observing and Experimental Station of Crop Pests in Hefei, Ministry of Agriculture, Hefei, China 2. Anhui Entry-Exit Inspection and Quarantine Bureau, Hefei, 230022, China |
| Abstract: | Sensitivity to epoxiconazole of 90 single-spore isolates of Magnaporthe oryzae was determined. The EC50 values for epoxiconazole in inhibiting mycelial growth of the 90 M. oryzae isolates were 0.11–0.86 μg/ml, with an average EC50 value of 0.260?±?0.082 μg/ml. There was no correlation between sensitivity to epoxiconazole and sensitivity to carbendazim or iprobenfos. In protective and curative tests, epoxiconazole applied at 200 μg/ml provided over 70 % control efficacy, while tricyclazole exhibited better protective than curative activity. The results of four field trials performed in 2010 and 2011 at two sites showed that epoxiconazole at 112.5 g a.i/ha provided over 75 % control efficacy, which was similar to tricyclazole with 300 g a.i./ha and better than carbendazim with 562.5 g a.i./ha. |
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