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The selection of Post-emergence Herbicides to Control of Poa annua in Kentucky Bluegrass

Kentucky bluegrass 내 새포아풀 방제를 위한 경엽처리제 선발

  • Hong, Beom-Seok (Turfgrass & Environment Research Institute, Samsung Everland Inc.) ;
  • Tae, Hyun-Sook (Turfgrass & Environment Research Institute, Samsung Everland Inc.)
  • 홍범석 (삼성에버랜드(주) 잔디.환경 연구소) ;
  • 태현숙 (삼성에버랜드(주) 잔디.환경 연구소)
  • Received : 2013.01.15
  • Accepted : 2013.02.22
  • Published : 2013.03.31

Abstract

This study was performed to find the effective post-emergence herbicides to control of Poa annua that has already emerged from the soil in Kentucky bluegrass. A total of 8 treatments consist of various post-emergence herbicides applied at recommended concentration or lower concentration than recommended concentration to prevent Kentucky bluegrass injury in this study. Methiozolin showed the least injury in Kentucky bluegrass during 40 days after treatments and there were no footprints by methiozolin in creeping bentgrass green during 20 days. However, Poa annua control was 60.4%, which was less than those of other 7 treatments in this study. Both of asulam sodium and iodosulfuron plus asulam sodium exhibited the higher Poa annua control of 81.7% and 82.2% respectively without serious injury in Kentucky bluegrass during 40 days, and they showed a slight footprints damage in creeping bentgrass green. On the other hand, critical Kentucky bluegrass injuries and the vivid and numerous footprints were occurred in treatments of trifloxysulfuron-sodium, foramsulfuron, rimsulfuron and flazasulfuron, even though they were applied with only 1/4 of recommended concentration. Methiozolin is available to reduce gradually Poa annua population on Kentucky bluegrass without severe turfgrass damage. Asulam sodium or iodosulfuron plus asulam sodium could be useful to remove Poa annua by spot treatment but it is prohibited to spray directly on green even spot.

본 연구는 켄터키블루그래스에 이미 발생된 새포아풀을 제거할 수 효과적인 제초제를 선발하고자 시행되었다. 다양한 경엽처리제로 구성된 총 8개의 처리구에서는 켄터키블루그래스의 약해를 낮추기 위해 추천농도 또는 추천농도보다 낮은 농도가 처리되었으며, 그린 주변에 제초제를 처리한 후 벤트그래스 그린에 밟고 들어간 경우 발생되는 발자국 피해를 함께 조사하였다. 시험 결과, 본 시험에서 경엽처리제 처리 후 40일 동안 켄터키블루그래스에서 가장 안전한 약제는 Methiozolin이었으며, 처리 후 20일 동안 조사된 벤트그래스 그린 내footprints test에서도 약해를 보이지 않았다. 하지만, 새포아풀에 대한 방제효과는 60.4%로 다른 7개의 처리구에 비해 낮았다. Asulam sodium과 Iodosulfuron + Asulam sodium 처리구는 켄터키블루그래스에 심각한 약해를 발생시키지 않았고, 각각 81.7%와 82.2%의 양호한 방제가를 보였으며, 벤트그래스 그린 내 발자국 시험에서도 경미한 피해를 발생시키는 데 그쳤다. 반면, Trifloxysulfuron-sodium, Foramsulfuron, Rimsulfuron, Flazasulfuron 처리구에서는 추천농도의 1/4인 저농도에서도 켄터키블루그래스에 심각한 약해가 발생되며, 벤트그래스 그린에도 많은 뚜렷한 발자국 피해가 나타났다. 결론적으로, methiozolin은 켄터키블루그래스로 조성된 페어웨이나 그린주변 프린지에 처리하여 큰 약해 없이 잡초의 밀도를 서서히 줄여나가는 데 유용할 것으로 보인다. Asulam sodium 또는 Iodosulfuron plus + Asulam sodium은 부분처리 방법을 통해 에이프런을 포함한 그린 주변에 발생된 새포아풀을 제거하는 데 유용하며 부분이라도 그린에 직접 처리하는 것은 위험하다.

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Cited by

  1. Methiozolin and Cumyluron for Preemergence Annual Bluegrass (Poa annua) Control on Creeping Bentgrass (Agrostis stolonifera) Putting Greens vol.28, pp.03, 2014, https://doi.org/10.1614/WT-D-14-00018.1
  2. Long-Term Roughstalk Bluegrass Control in Creeping Bentgrass Fairways 2017, https://doi.org/10.1017/wet.2017.72
  3. Effects of Several Herbicides on Control of Creeping Bentgrass in the Kentucky Bluegrass and Its Recovery vol.2, pp.4, 2013, https://doi.org/10.5660/WTS.2013.2.4.395
  4. Biological Characteristics and Control of Annual Bluegrass (Poa annua) vol.2, pp.2, 2013, https://doi.org/10.5660/WTS.2013.2.2.122