Effects of mixture of wood vinegar and sulfonylurea-based herbicides on the castrol of mixed weed flora and the yield of transplanted rice (Oryza sativa L.)
2007
Rico, C.M. | Mintah, L.O. | Kim, M., Kyungpook National Univ., Daegu 702-701 (Korea). Div. of Biosciences | Chung, I.K., Catholic Univ. of Daegu, Geyongsan-si, Gyeongbuk, 712-702 (Korea). Dept. of Biotechnology | Son, T.K., Cu Techno Park, Gyeongsan-si, Gyeongbuk 712-702 (Korea). R and D Center | Lee, S.C., Kyungpook National Univ., Daegu 702-701 (Korea). Div. of Biosciences
The effects of mixed treatments of wood vinegar (WV) and sulfonylurea-based herbicides on the weed control and the yield and yield components of transplanted rice were investigated. The herbicides tested were: pyrazosulfuron-ethyl esprocarb [PSE, ethyl-5-((4, 6-dimethoxypyrimidin-2-ylcarbamoyl) sulfamoyl)-1-methylpyrazole-4-carboxylate + S-benzyl (RS)-1-2 dimethylpropyl(ethyl) thiocarbarmate), pyrazosulferon-ethyl + molinate (PSM, S-ethyl azepane-1-carbothioate) and pyrazosulfuron-ethyl + mefenacet (PSMF, 2-(1,3-benzothiazol-2-yloxy)-N-methylacetanilide). Five treatments were used: 1) recommended (RH: 100 percent), 2) half-recommended (HRH: 50 percent), 3) HRH + 500 (1 mL wood vinegar/500 mL water), 4) HRH + 1000 (1 mL wood vinegar/1000 mL water) and 5) untreated control. Results showed that only PSM significantly increased the efficacy of HRH while PSE and PSMF already obtained high efficacy in HRH alone. Higher rice yield was obtained in the HRH plus wood vinegar treatments of PSM. On the other hand, a decrease in rice yield was observed in the HRH plus wood vinegar treatments of PSE and PSMF compared with the RH and HRH treatments. Data on yield components showed no significant variations in values among the treatments. No clear trend for grain appearance and nutritional quality was observed.
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