Microbial Degradation of Diazinon in Sudmerged Soil

담수토양내 미생물에 의한 Dazinon의 분해

  • 김중호 (충남대학교 자연과학대학 미생물학과) ;
  • 이영하 (충남대학교 자연과학대학 미생물학과) ;
  • 최종우 (충남대학교 농과대학 농화학과) ;
  • 이규승 (충남대학교 농과대학 농화학과)
  • Published : 1989.06.01


The mechanisms and metabolic products involved in the degradation of an organophosphate insecticide, diazinon, were studied in submerged paddy soil under the laboratory condition at $30^{\circ}C$. Diazinon abatement in non-sterilized soil was more rapid than indicating microbial participation in diazinon in soil. One-half of the original applications was lost in 2 days and less than 5% remained after 7 days. During the same period, dizinon applications increased tha microbial populations in accordance with the monooxygenase and esterase activities in soil. These results suggest that the microbiological factors develop in soil following diazinon application. The esterase and monooxygenase-catalyzing degradation products of diazinon were isolated and tentatively identified by mass spectrometryas 2-isopropyle-6-methyl-4-hydroxy pyrimidine, diazoxon, hydroxydiazinon, and sulfotep.