Degradation Ability of Fungicide Myclobutanil by Several Soil Bacteria

수종(數種) 토양세균(土壤細菌)에 의한 살균제(殺菌劑) Myclobutanil의 분해력(分解力)

  • Han, Seong-Soo (Department of Agricultural Chemistry, Wonkwang University) ;
  • Park, Pill-Jae (Department of Agricultural Chemistry, Wonkwang University) ;
  • Jeong, Jae-Hun (Department of Agricultural Chemistry, Wonkwang University) ;
  • Rim, Yo-Sup (Department of Agricultural Chemistry, Wonkwang University)
  • Published : 1996.03.31


This study was carried out to isolate some bacterial strains which had potentiality of good degrader of fungicides from herbicide free soil and to clarify degradation of a fungicide mycrobutanyl[2-p-chlorophenyl-2-(1H-1,2,4-triazole-1-ylmethyl)-hexanenitrile]. Ten strains of the gram-positive and the gram-negative bacteria were isolated and identified. Most of them vigorously proliferated at 55ppm of mycrobutanil, but the stains were not grown when more than 70ppm of this fungicide were treated Staphylococcus spp. I, Actinobacillus spp. III, and another I of the isolated bacteria degraded more than 35% of the treated mycrobutanil. These three strains could utilize mycrobutanil as nitrogen and carbon sources. Mycrobutanil was rapidly decomposed by these strains when applied once or three times. Tested bacteria gradually increased in growth when mycrobutanil was applied repeatedly. Degradation of mycrobutanil and growth of these bacteria were greater in pH 5.5, and they were high in the order of $28^{\circ}C$ > $18^{\circ}C$ > $38^{\circ}C$.