Campus Units

Entomology

Document Type

Article

Publication Version

Published Version

Publication Date

2-1993

Journal or Book Title

Journal of Agricultural and Food Chemistry

Volume

41

Issue

2

First Page

313

Last Page

318

DOI

10.1021/jf00026a035

Abstract

Field and laboratory studies were conducted to investigate the degradation of the organophosphorus insecticide isazofos (0-5-chloro-l-isopropyl-1H-l,2,4-triazol-3-ylO,O-diethyl phosphorothioate) in soil. In a 6-year field study, soil pH was an important factor influencing the degradation of isazofos inasmuch as an increased rate of degradation was observed in soils with previous isazofos applications and pH of 6.9 or more. A laboratory study of [14Clisazofos confirmed the rapid degradation of this insecticide in high pH soils. No increased degradation rate, however, was observed in sterilized high-pH soils. The availability of isazofos to microorganisms, based on sorption of isazofos to soil, seems to be an important factor influencing the degradation of isazofos in soil. Sorption coefficients were negatively correlated with isazofos degradation rate.

Comments

Reprinted (adapted) with permission from Journal of Agricultural and Food Chemistry, 41(2); 313-318. Doi: 10.1021/jf00026a035. 1993 American Chemical Society.

Rights

Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.

Language

en

File Format

application/pdf