Distribution of Pesticide Applied with Different Formulations and Rice Growing Stages in Paddy Fields

벼 재배환경에서 생육단계에 따른 제형별 살포농약의 분포특성

  • Park, Byung-Jun (National Institute of Agricultural Science & Technology. RDA) ;
  • Park, Sang-Won (National Institute of Agricultural Science & Technology. RDA) ;
  • Kim, Jin-Kyoung (National Institute of Agricultural Science & Technology. RDA) ;
  • Park, Kyung-Hun (National Institute of Agricultural Science & Technology. RDA) ;
  • Kim, Won-Il (National Institute of Agricultural Science & Technology. RDA) ;
  • Kwon, Oh-Kyung (National Institute of Agricultural Science & Technology. RDA)
  • 박병준 (농업과학기술원 농산물안전성부) ;
  • 박상원 (농업과학기술원 농산물안전성부) ;
  • 김진경 (농업과학기술원 농산물안전성부) ;
  • 박경훈 (농업과학기술원 농산물안전성부) ;
  • 김원일 (농업과학기술원 농산물안전성부) ;
  • 권오경 (농업과학기술원 농산물안전성부)
  • Published : 2008.03.31

Abstract

To elucidate the exposure of pesticide in agricultural environment and to investigate distribution of pesticide in paddy fields. This experiment was carried out to clarify pesticide distribution in paddy fields applied with different formulations and growing stages. Initial dissipation rate of applied butachlor EW and oxadiazon EC before rice planting were more than 90% within 3 days in paddy fields. The distribution of a.i. in the pesticide formulations tested depended upon the elapsed time at each growing stage of rice plant after application. Most of pesticides applied within 15 days after transplanting of rice seedlings, more than 95%, were located in the surface water and soil regardless of pesticides; butachlor, thiobencarb and molinate GR. The distribution of iprobenfos GR, tricyclazole WP and phenthoate EC, after application 2 hours in middle growing stage (46 days after rice planting) were shown as 16.1, 48.9 and 38.9% in surface water, 83.6, 15.4 and 10.7% in soil, and 0.3, 35.7 and 50.4% in rice plants of paddy fields, respectively. Also tricyclazole WP and phenthoate EC, after application 2 hours in the late rice growing stage (90 days after rice planting) were distributed to 7.8 and 9.8% in surface water, and 21.7 and 5.1% in soil, and 70.5 and 85.1% in rice plants of paddy fields, respectively.

Keywords

paddy field;pesticide distribution;pesticide formulations;rice plant

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