The Korean Journal of Pesticide Science (농약과학회지)

The Korean Society of Pesticide Science (한국농약과학회)
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Herbicidal properties of picolinafen

제초제 picolinafen의 제초활성 특성

  • 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)
  • Published : 2006.12.30
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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.

본 연구에서 Phytoene desaturase를 저해하여 식물체내의 카르티노이드의 생합성을 저해하는 picolinafen(N-(4-fluorophenyl)-6-[3-(trifluoromethyl)phenoxy]-2-pyridinecarboxamide)의 특성을 알아보기 위하여 밀(Triticum aestivum L.), 보리(Hordeum vulgare L.)에 대한 약해와 제초 Spectrum, 처리적기, 잔효력, 저항성 잡초 방제효과 등을 평가하였다. Picolinafen은 밀, 보리에 대한 약해는 파종 동시 처리시 가장 높게 나타났으며, 처리시기가 늦어질수록 감소하였다. 제초활성은 발아 전, 후 처리 모두에서 나타나며, 화본과 잡초보다는 광엽 잡초에 높았다. 처리적기는 감수성의 차이에 따라 초종별로 다양하였으나 파종 후 $5{\sim}15$일 사이의 초기 경엽처리시 방제효과가 가장 높아 적기로 판단되었다. 잔효력은 60 g ai $ha^{-1}$ 처리시 바랭이(Digitaria ciliaris)와 유채(Brassica napus)에 대한 $LT_{50}$값(생체중을 50% 저해하는 잔효기간)이 각각 9.3일, 6.5일로 나타나 비교적 짧은 편이었다. Triazine계 제초제에 저항성인 털비름(Amaranthus retroflexus)에 대해서는 감수성 털비름과 제초활성에 차이가 없었다. 따라서 본 실험 결과 picolinafen은 광엽잡초를 주요 대상잡초로 생육초기 경엽처리시 방제효과가 가장 우수하였으며, 저항성 잡초 방제에 사용 가능한 특성을 보여주었다.

Keywords

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