Korean Journal of Weed Science (한국잡초학회지)

The Korean Society of Weed Science & The Turfgrass Society of Korea Archive (한국잡초학회 & 한국잔디학회)
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Effect of Light, Organophosphorus Compounds and Plant Growth Regulators on Phytotoxicity of Pendimethalin

Pendimethalin의 제초활성(除草活性)에 미치는 광(光), 유기인계화합물(有機燐系化合物) 및 식물생장조절제(植物生長調節劑)의 영향(影響)

  • Chun, J.C. (Department of Agricultural Chemistry, Jeonbug National University) ;
  • Hwang, I.T. (Department of Agricultural Chemistry, Jeonbug National University) ;
  • Han, M.S. (Department of Agricultural Chemistry, Jeonbug National University) ;
  • Jang, B.C. (Department of Agricultural Chemistry, Jeonbug National University)
  • Published : 1986.12.30
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Abstract

This experiment was conducted to determine the effect of light, organophosphorus compounds and plant growth regulators on phytotoxicity of pendimethalin (3,4-dimethyl-2,6-dinitro-N-1-ethyl propylamine) in rice (Oryza saliva L.). The phytotoxicity of pendimethalin on post-germination growth of rice was greatly reduced by light treatment. This effect resulted from photodecomposition of pendimethalin. Antidoting activity on phytotoxicity of pendimethalin varied with the kind of organophosphorus compounds used and the application time. The greatest antidoting effect was obtained from edifenphos (0-3thy1 S,S-diphenylphosphorothioate). However, the effect was not observed when edifenphos was applied prior to pendimethalin. There was no antidoting effect of indole acetic acid (IAA), gibberellic acid ($GA_3$) and kinetin used alone, but combinations of 3 ppmw IAA + either 3 or 5 ppmw $GA_3$ and 1 ppmw kinetin + 10 ppmw $GA_3$ reduced the phytotoxicity of pendimethalin.

Pendimethalin의 약해(藥害) 발현(發現)에 미치는 광(光), 유기인계(有機燐系) 화합물(化合物) 및 식물생장(植物生長) 조절제(調節劑)의 처리(處理) 영향(影響)을 조사(調査)하였다. 벼 발아후(發芽後) 생육(生育)에 나타난 pendimethalin의 약해(藥害)는 광조건하(光條件下)에서 크게 경감(輕減)되었는데, 이는 광(光)에 의한 pendimethalin의 분해(分解)에 의한 것이었다. 유기인계(有機燐系) 화합물(化合物) 처리(處理)에 의한 pendimethalin 약해경감효과(藥害輕減效果)는 사용약제(使用藥劑)의 종류(種類)에 따라 다르며, 실험약제(實驗藥劑) 중 edifenphos의 효과(效果)가 가장 좋았다. 그러나 이러한 약해경감(藥害輕減) 효과(效果)는 edifenphos를 pendimethalin과 동시(同時) 또는 후(後)에 처리(處理)할 때만 나타나며, pendimethalin 처리전(處理前)에 edifenphos가 처리(處理)되면 약해경감(藥害輕減) 효과(效果)는 없었다. 식물생장(植物生長) 조절제(調節劑) IAA, $GA_3$ 및 kinetin 등의 처리(處理)에 의한 pendimethalin 약해(藥害)의 경감효과(輕減效果)는 이들을 단독(單獨)으로 처리(處理)하면 얻을 수 없었지만, IAA 3ppmw+$GA_3$ 3ppmw 및 5ppmw와 kinetin 1ppmw+$GA_3$ 10ppmw의 조합처리(組合處理)로 약해경감(藥害輕減) 효과(效果)를 얻었다.

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