Efficacy Evaluation of Fungicides for Rice Bakanae Disease

doi:10.11924/j.issn.1000-6850.casb18010047

Abstract

Abstract: To investigate fungicide control of rice bakanae disease (RBD), the indoor toxicity of 12 fungicides TC and 12 fungicide formulations toFusarium fujikuroi with double-resistance to carbendazim and prochloraz were detected by mycelium growth rate method, respectively, and the field control tests were conducted in 2016 and 2017. The indoor toxicity tests showed that the inhibiting activity of 12 fungicides TC to mycelium growth was tebuconazole > phenamacril > prochloraz > fludioxonil > carbendazim > thiophanate-methyl > ethylicin > azoxystrobin > hymexazol > thiram > metalaxyl-M > metalaxyl, and the inhibiting activity of 12 fungicide formulations was 0.25% tebuconazole > 25% phenamacril > 25% prochloraz > 20% phenamacril?cartap WP > 25 g/L fludioxonil FS > 16% prochloraz?cartap WP > 62.5 g/L metalaxyl-M?fludioxonil FS > 22% penflufen FS > 12% thiophanate-methyl?azoxystrobin?metalaxyl FS > 17% carbendazim?thiram FS > 17% cartap?ethylicin WP > 15% hymexazol WP. Field trials in 2016 and 2017 showed that the field control effect of recommended doses of the 12 fungicide formulations against RBD was in the order of 22% penflufen FS > 25% phenamacril SC > 20% phenamacril ? cartap WP > 17% cartap ? ethylicin WP > 62.5 g/L metalaxyl-M?fludioxonil FS > 12% thiophanate-methyl?azoxystrobin?metalaxyl FS > 0.25% tebuconazole FS > 25% prochloraz EC > 16% prochloraz?cartap WP > 25 g/L fludioxonil FS > 17% carbendazim?thiram FS > 15% hymexazol WP. In conclusion, 22% penflufen FS, 25% phenamacril SC and 20% phenamacril? cartap WP have excellent application prospect in RBD control and resistance management.

CLC Number:

S432.4

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