The Korean Journal of Pesticide Science (농약과학회지)

The Korean Society of Pesticide Science (한국농약과학회)
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Herbicidal Response and Control of Scirpus juncoides Roxb. Resistant to Sulfonylurea Herbicides

Sulfonyurea계 제초제 저항성 올챙이고랭이(Scirpus juncoides Roxb.)의 제초제 반응과 방제

  • Park, Tae-Seon (Department of Agricultural Biology, National Institute of Agricultural Science and Technology, RDA) ;
  • Kang, Dong-Kyun (Dept. of Agronomy, College of Agriculture, Kyungpook National University) ;
  • Kim, Kil-Ung (Dept. of Agronomy, College of Agriculture, Kyungpook National University)
  • 박태선 (농업과학기술원 농업생물부) ;
  • 강동균 (경북대학교 농업생명과학대학) ;
  • 김길웅 (경북대학교 농업생명과학대학)
  • Published : 2005.09.30
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Abstract

This study was conducted to investigate the herbicidal response and effective control strategy of sulfonylurea(SU)-resistant Scirpus juncoides Roxb. occurred in the paddy fields of Korea. A biotype of Scirpus juncoides Roxb. resistant to SU was identified in the paddy fields treated with SU herbicide-based mixtures for seven consecutive years. The apparent SU resistance observed in Scirpus juncoides Roxb. was completely confirmed in greenhouse tests. The susceptible biotype was almost controlled at the recommended dose of all the tested, but the resistant biotype was survived 20 to 30% even at 10 times higher dose of each the recommended dose of SU herbicides. The $GR_{50}$ values of 4 SU herbicides for the resistant biotype were 53 to 88 times higher than those for the susceptible biotype. The acetolactate synthase(ALS) isolated from the resistant biotype against bensulfuron-methyl and pyrazosulfuron-ethyl was less sensitive than that of the susceptible biotype. The $I_{50}$ values of the resistant biotype against bensulfuron-methyl and pyrazosulfuron-ethyl were 498 and 126 times higher than those for the susceptible biotype. A rapid diagnosis for identifying resistance of Scirpus juncoides Roxb. was possible within at least 3 days after SU herbicides. Three herbicides having different mode of action from SU herbicide, carfentrazone-ethyl, pyrazolate and simetryne exhibited excellent controlling effects on the resistant biotype of Scirpus juncoides Roxb. till 3.5 leaf stage. Among the SU-based herbicides, pyriminobac-methyl+pyrazosulfuroil-ethyl+carfentrazone-ethyl GR and azimsulfuron+carfentrazone-ethyl+pyriminobac-methyl GR were very effective to control resistant biotype of Scirpus juncoides Roxb. without rice injury. The resistant biotype which were not controlled with SU herbicise-based herbicides survived from the fields were effectively controlled by bentazone SL.

본 연구는 7년 동안 연속적으로 sulfonylurea(SU)계 제초제를 사용한 남부지역의 논에서 발생한 들에 대한 저항성 잡초 올챙이고랭이의 제초제 반응과 방제법을 구명하기 위하여 실시하였다. 온실 조건에서 SU계 제초제에 대한 저항성 및 감수성 생태형을 파종 후 10일에 azimsulfuron, bensulfuron, imazosulfuron 그리고 pyrazosulfuron을 처리하였을 때 감수성 생태형은 각 제초제의 추천량에서 완전히 방제되었으나 저항성생태형은 추천량의 10배량에서도 $20{\sim}30%$ 생존되었다. 생체중 50%를 억제하는 각 제초제의 농도($GR_{50}$)는 두 생태형 간에 현저한 차이가 있었으며, 조사된 4종류의 각 SU계 제초제들에 대한 $GR_{50}$는 감수성 생태형에 비해 $53{\sim}88$배 높게 나타났다. 또한 SU계 제초제 저항성 및 감수성 생태형의 올챙이고랭이로 부터 추출한 acetolactate synthase(ALS)에 대한 bensulfuron-methyl과 pyrazosulfuron-ethyl의 50%억제 저항성 생태형이 감수성 생태형보다 각각 498 및 126배 높게 나타났다. SU계 제초제 저항성 올챙이고랭이는 조기진단법에 의하여 적어도 3일 이내에 저항성 진단이 가능하였다. 올챙이고랭이 $1.5{\sim}2.5$엽기에서는 조사된 대부분의 비SU계 제초제들이 효과적이었으나 3.5엽기에서는 carfentrazone-ethyl, pyrazolate, simetryne가 매우 효과적이었다. 그리고 azimsulfuron+carfentrazone-ethyl+pyraminobac 입제와 pyraminobac+pyrazosulfuron+carfentrazone 입제는 벼에 약해 없이 SU계 저항성 올챙이고랭이에 매우 효과적이었다. SU계 혼합 제초제를 처리 후 생존한 저항성 올행이고랭이는 경엽처리제인 bentazone에 의해서 효과적으로 방제되었다.

Keywords

References

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