Leaching, soil residue, and volatilization of dicamba from controlled release granular formulations

방출조절형 dicamba 입제의 용탈, 토양잔류 및 휘산

  • Oh, Kyeong-Seok (Pesticides Division, National Institute of Agricultural Science & Technology, RDA) ;
  • Oh, Byung-Youl (Pesticides Division, National Institute of Agricultural Science & Technology, RDA) ;
  • Park, Seung-Soon (Pesticides Division, National Institute of Agricultural Science & Technology, RDA) ;
  • Jin, Yong-Duk (Pesticides Division, National Institute of Agricultural Science & Technology, RDA) ;
  • Lee, Jae-Koo (Department of Agricultural Chemistry, College of Agriculture, Chungbuk National University)
  • 오경석 (농업과학기술원 작물보호부 농약개발과) ;
  • 오병렬 (농업과학기술원 작물보호부 농약개발과) ;
  • 박승순 (농업과학기술원 작물보호부 농약개발과) ;
  • 진용덕 (농업과학기술원 작물보호부 농약개발과) ;
  • 이재구 (충북대학교 농과대학 농화학과)
  • Published : 1998.04.30

Abstract

In order to minimize harmful side effects, extend weed control performance, and control the releasing rate of the active ingredient, dicamba controlled release granular formulations were prepared with starch as matrix. Leaching, soil residue, and volatilization of the granules were compared with dicamba soluble concentrate formulation (SL). Leaching of dicamba through the soil applied with the granules could be reduced more than 50% as compared with that of dicamba SL. The half life of dicamba in loamy soil treated with the granules was 50 to 51 days, while that in sand loamy soil was 50 to 58 days. Whereas, the half life of dicamba in loamy and sand loamy soil applied with dicamba SL was 24 and 22 days, respectively. Volatilization of dicamba from the granules was 10 times less than that of dicamba SL.

Dicamba의 부작용을 최소화하고, 약효지속효과를 증진하며, 유효성분의 용출속도를 조절할 수 있는 전분을 중합매체로 한 방출조절형 dicamba 입제를 제조하여 기존의 dicamba 액제와 용탈, 토양잔류 및 휘산을 비교하였다. 이들 방출조절형 dicamba 입제는 dicamba 액제에 비하여 약 50% 이상 용탈이 감소되었으며, 토양잔류는 양토에 처리된 dicamba 입제의 토양중 반감기가 $50{\sim}51$일 이었으며, 사양토에 처리하였을때는 $50{\sim}58$일 이었다. 한편 양토 및 사양토에 처리된 dicamba 액제는 각각 24일과 22일 이었다. 또한 dicamba의 휘산성은 방출조절형 dicamba 입제가 dicamba 액제에 비하여 약 10배의 휘산억제효과가 있었다.

Keywords