HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in ISI Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (15) Citing Articles via Google Scholar Google Scholar Articles by Thorstensen, C. W. Articles by Christiansen, A. Search for Related Content PubMed PubMed Citation Articles by Thorstensen, C. W. Articles by Christiansen, A. GeoRef GeoRef Citation Agricola Articles by Thorstensen, C. W. Articles by Christiansen, A. Related Collections Organic Compounds Agricultural Pesticides

TECHNICAL REPORT
Organic Compounds in the Environment

Sorption of Bentazone, Dichlorprop, MCPA, and Propiconazole in Reference Soils from Norway

^a The Norwegian Crop Research Institute, Plant Protection Centre, Høgskoleveien 7, N-1432 Ås, Norway
^b The Norwegian Crop Research Institute, Plant Protection Centre, Pesticide Laboratory, Osloveien 1, N-1430 Ås, Norway

* Corresponding author (christian.thorstensen{at}planteforsk.no)

Received for publication September 13, 2001. Sorption–desorption kinetic and isotherm studies were performed by the batch equilibrium technique in three Norwegian soils. The soils were a fine sandy loam, a loam, and a soil of highly decomposed organic material. Two commercially formulations were used, Triagran-P and Tilt, containing either a mixture of bentazone [3-isopropyl-1H-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxide], dichlorprop [(R)-2-(2,4-dichlorophenoxy)-propionic acid], and MCPA [(4-chloro-2-methylphenoxy)acetic acid], or propiconazole [(±)1-(2-(2,4-dichlorophenyl)-4-propyl-1,3-dioxolan-2-ylmethyl)-1H-1,2,4-triazole] alone. Sorption–desorption equilibrium occurred within 10 h for all pesticides. The Freundlich isotherms indicated nonlinear sorption of bentazone, dichlorprop, MCPA, and propiconazole. For all pesticides the highest Freundlich adsorption coefficient (K_F) values were in the soil with highest organic content and lowest pH. For the fine sandy loam and loam, which are representative Norwegian agricultural soils, the results indicate that bentazone, dichlorprop, and MCPA are mobile with K_F values ranging from 0.07 to 1.50 mg^1-1/n kg^-1 L^1/n. Propiconazole is much less mobile with K_F values ranging from 27.00 to 36.02 mg^1-1/n kg^-1 L^1/n in the agricultural soils.

Abbreviations: K_d, distribution coefficient • K_F, Freundlich adsorption coefficient

This article has been cited by other articles:

				M. Larsbo, T. S. Aamlid, L. Persson, and N. Jarvis Fungicide Leaching from Golf Greens: Effects of Root Zone Composition and Surfactant Use J. Environ. Qual., June 23, 2008; 37(4): 1527 - 1535. [Abstract] [Full Text] [PDF]