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http://dx.doi.org/10.5660/WTS.2016.5.4.191

Selectivity of Tefuryltrione between Rice and Eleocharis kuroguwai  

Song, Jong-Seok (Department of Plant Science, Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University)
Park, Yong Seog (Bayer CropScience AG)
Park, Min-Won (Department of Plant Science, Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University)
Lee, Jeong Deug (Bayer CropScience AG)
Kim, Do-Soon (Department of Plant Science, Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University)
Publication Information
Weed & Turfgrass Science / v.5, no.4, 2016 , pp. 191-195 More about this Journal
Abstract
Tefuryltrione is a new hydroxyphenylpyruvate dioxygenase (HPPD) inhibitor, which has been recently registered for the use for paddy rice, Korea. Dose-response studies were conducted to compare rice safety and weed control efficacy of tefuryltrione against Eleocharis kuroguwai. When rice and E. kuroguwai were applied at a range of doses of tefuryltrione, $GR_{90}$ values (the dose required to inhibit weed growth by 90%) of E. kuroguwai were $82.38-93.39g\;a.i.\;ha^{-1}$ in two independent experiments. The $GR_{10}$ values (the dose required to inhibit rice growth by 10%) of tefuryltrione for rice were $297.77-471.54g\;a.i.\;ha^{-1}$. As a result, the selectivity indices ($GR_{10}$ for $rice/GR_{90}$ for E. kuroguwai) of tefuryltrione were 3.19-5.72. Therefore, these results demonstrate that tefuryltrione has a relatively high selectivity between rice and E. kuroguwai with a high herbicidal activity against E. kuroguwai and a good rice safety.
Keywords
Eleocharis kuroguwai; Hydroxyphenylpyruvate Dioxygenase; HPPD; Rice; Selectivity; Tefuryltrione;
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