✦ LIBER ✦

Transformation of synthetic pyrethroid insecticides by a thermophilicBacillussp

✍ Scribed by S. E. Maloney; A. Maule; A. R. W. Smith

Publisher: Springer
Year: 1992
Tongue: English
Weight: 498 KB
Volume: 158
Category: Article
ISSN: 0302-8933
DOI: 10.1007/bf00245246

No coin nor oath required. For personal study only.

✦ Synopsis

Employing a mineral salts medium containing Tween 80 as the primary carbon source, a strain of Bacillus stearothermophilus was isolated which was able to hydrolyse selected second and third-generation pyrethroids to non-insecticidal products. Of a range of pyrethroid insecticides the trans-isomer of permethrin was the most readily transformed by this microbial isolate, whilst flumethrin was the least. 3-Phenoxybenzoic acid and the respective halovinyl or haloacid moieties were detected as the major hydrolytic products of the pyrethroids. It is believed that 3-phenoxybenzoic acid was formed from 3-phenoxybenzyl alcohol which was not however detected as an intermediate in these systems. 3-Phenoxybenzoic acid was further transformed to 4-hydroxy-3-phenoxybenzoic acid. A potential metabolic pathway has been described.

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