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Herbicidal properties of picolinafen  

Lee, Jong-Nam (R&D Park, LG Life Sciences Ltd.)
Koo, Suk-Jin (R&D Park, LG Life Sciences Ltd.)
Kim, Do-Soon (R&D Park, LG Life Sciences Ltd.)
Hwang, Ki-Hwan (R&D Park, LG Life Sciences Ltd.)
Kim, Dae-Hwang (Bio organic Science Division, Korea Research Institute of Chemical Technology)
Ko, Yong-Kwan (Bio organic Science Division, Korea Research Institute of Chemical Technology)
Chung, Keun-Hoe (Bio organic Science Division, Korea Research Institute of Chemical Technology)
Ryu, Jae-Wook (Bio organic Science Division, Korea Research Institute of Chemical Technology)
Woo, Jae-Chun (Bio organic Science Division, Korea Research Institute of Chemical Technology)
Koo, Dong-Wan (Bio organic Science Division, Korea Research Institute of Chemical Technology)
Publication Information
The Korean Journal of Pesticide Science / v.10, no.4, 2006 , pp. 351-358 More about this Journal
Abstract
This study was conducted to evaluate herbicidal properties of picolinafen in terms of crop safety, weed control spectrum, application window, residual efficacy and resistant weed control. Herbicidal phytotoxicity of picolinafen to wheat and barley was greatest when applied at 0 days after sowing (DAS), but decreased significantly as plant growth advanced. Picolinafen showed greater activity against broadleaved weeds than grass weeds. Picolinafen showed highest activity when it was applied at early post emergence timing (5 to 15 DAS), and showed significantly decreased activity at 20 DAS application. The $LT_{50}$ values (the period from application required for residual control by 50%) was 9.3 and 6.5 days against Digitaria ciliaris and Brasica naus at 60 g ai $ha^{-1}$, respectively. Picolinafen showed similar activities against both triazine resistant and sensitive Amaranthus retroflexus. Collectively, picolinafen appeared to have a good fitness to control resistant broad leaved weeds control by early post emergence application.
Keywords
picolinafen; crop safety; spectrum; residual efficacy; resistant weed;
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