Weed & Turfgrass Science

The Korean Society of Weed Science & The Turfgrass Society of Korea Archive (한국잡초학회 & 한국잔디학회)
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Control and Occurrence of Herbicide Resistance Echinochloa oryzicola in Rice Paddy Field of Honam Area

호남지역에서 제초제 저항성 강피의 발생과 방제

  • Received : 2017.02.01
  • Accepted : 2017.03.17
  • Published : 2017.04.03
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Abstract

This study was carried out to investigate the ACCase inhibiting herbicide resistant Echinochloa oryzicola collected in a Honam rice field and to investigate the control of E. oryzicola in directly seeded paddy rice field. The study result showed that about 44% of the 67 biotypes collected in the rice field in Honam region were resistant to ACCase-inhibiting herbicides. The efficacy of several chemical herbicides on these resistant E. oryzicola biotypes was evaluated according to their application timings. Among herbicides applied 4 days before seeding, pretilachlor, butachlor, oxadiazon, oxadiargyl, oxadiazon+pretilachlor, and fentrazamide+oxadiargyl, provided 95% or higher control of the resistant E. oryzicola biotypes. Among the herbicides applied 10 days after seeding, bromobutide+fentrazamide+imazosulfuron, benzobicyclon+fentrazamide+imazosulfuron, pyrazosulfuron-ethyl+thiobencarb, fentrazamide+imazosulfuron, bromobutide+imazosulfuron+mefenacet and bromobutide+imazosulfuron+pyraclonil provided ${\geq}95%$ control of the weeds. Bromobutide+imazosulfuron+mefenacet and bromobutide+pyrazosulfuron-ethyl+pyriminobac-methyl, applied 15 days after seeding, provided ${\geq}95$ and 90% control of the weeds. Foliar application of cyhalofop-butyl+propanil at 30 days after seeding provided ${\geq}90%$ control of the weeds. In addition, oxaziclomefone provided ${\geq}90%$ control for 40 days after soil application. These results show that E. oryzicola biotypes resistant to ACCase-inhibiting herbicides could be effectively controlled in directly seeded rice in submerged paddy fields using single or tank-mixed chemical herbicides currently available on the market.

본 연구는 벼 재배 논에서 발생하고 있는 강피의 ACCase 저해 제초제에 대한 저항성을 검정하여 발생 지역을 파악하고, 벼 무논직파 재배시 저항성 강피에 대한 방제특성을 구명하고자 실시하였다. 그 결과, 전남, 전북 벼 재배 논에서 수집한 72종의 중에서 ACCase 저해 제초제 cyhalohop-butyl에 대하여 약 44% 정도가 저항성으로 판단되었다. 저항성 강피에 대하여 토양처리 제초제의 처리시기별로 방제효과를 보면 파종 전에 pretilachlor, butachlor, oxadiazon, oxadiargyl, oxadiazon+pretilachlor, fentrazamide+oxadiargyl의 처리 및 파종 후 10일에 bromobutide+fentrazamide+imazosulfuron, benzobicyclon+fentrazamide+imazosulfuron, pyrazosulfuron-ethyl+thiobencarb, fentrazamide+imazosulfuron, bromobutide+imazosulfuron+mefenacet, bromobutide+imazosulfuron+pyraclonil의 처리는 95% 이상, 파종 후 15일에 bromobutide+imazosulfuron+mefenacet의 처리는 95%, bromobutide+pyrazosulfuron-ethyl+pyriminobac-methyl의 처리는 90%정도 방제효과를 보였다. 파종 후 30일에 cyhalofop-butyl+propanil의 경엽처리도 90% 이상의 방제효과를 보였다. 또한 저항성 강피에 대하여 토양 잔류에 의한 방제효과를 보면 oxaziclomefone는 처리 후 40일까지 90% 이상 방제효과가 있었다. 따라서 벼 무논직파 재배 논에서도 ACCase 저해 제초제 저항성 강피를 효과적으로 방제할 수 가 있었다.

Keywords

References

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