Tags

Type your tag names separated by a space and hit enter

Modelling the effects of alcohol ethoxylates on diffusion of pesticides in the cuticular wax of Chenopodium album leaves.
Pest Manag Sci 2006; 62(2):137-47PM

Abstract

Cuticular waxes represent the first and, in most cases, the limiting barrier for foliar uptake of pesticides from solution. Sorption of pesticides in reconstituted cuticular wax (wax/water partition coefficients) of Chenopodium album L. and in isolated cuticular membranes (cuticle/water partition coefficients) of Prunus laurocerasus L. was determined. Diffusion coefficients of pesticides in reconstituted cuticular wax of C. album leaves were size-dependent, increasing with increasing molar volume. In the presence of alcohol ethoxylates, diffusion coefficients were enhanced by up to two orders of magnitude, and size selectivity was significantly decreased. The accelerating effect and the decrease in size selectivity were attributed to plasticisation of the cuticular wax by the alcohol ethoxylates increasing the fluidity in the wax. A free volume model adopted from polymer science was successfully applied to predict diffusion coefficients of pesticides on the basis of the transport properties of the wax (size selectivity and crystallinity), the molar volume of the diffusing compound and the accelerator concentration in the wax.

Authors+Show Affiliations

Julius-von-Sachs-Institut für Biowissenschaften, Lehrstuhl für Botanik II-Okophysiologie und Vegetationsökologie, Universität Würzburg, Julius-von-Sachs-Platz 3, D-97082 Würzburg, Germany.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

16308869

Citation

Burghardt, Markus, et al. "Modelling the Effects of Alcohol Ethoxylates On Diffusion of Pesticides in the Cuticular Wax of Chenopodium Album Leaves." Pest Management Science, vol. 62, no. 2, 2006, pp. 137-47.
Burghardt M, Friedmann A, Schreiber L, et al. Modelling the effects of alcohol ethoxylates on diffusion of pesticides in the cuticular wax of Chenopodium album leaves. Pest Manag Sci. 2006;62(2):137-47.
Burghardt, M., Friedmann, A., Schreiber, L., & Riederer, M. (2006). Modelling the effects of alcohol ethoxylates on diffusion of pesticides in the cuticular wax of Chenopodium album leaves. Pest Management Science, 62(2), pp. 137-47.
Burghardt M, et al. Modelling the Effects of Alcohol Ethoxylates On Diffusion of Pesticides in the Cuticular Wax of Chenopodium Album Leaves. Pest Manag Sci. 2006;62(2):137-47. PubMed PMID: 16308869.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Modelling the effects of alcohol ethoxylates on diffusion of pesticides in the cuticular wax of Chenopodium album leaves. AU - Burghardt,Markus, AU - Friedmann,Adrian, AU - Schreiber,Lukas, AU - Riederer,Markus, PY - 2005/11/26/pubmed PY - 2006/7/4/medline PY - 2005/11/26/entrez SP - 137 EP - 47 JF - Pest management science JO - Pest Manag. Sci. VL - 62 IS - 2 N2 - Cuticular waxes represent the first and, in most cases, the limiting barrier for foliar uptake of pesticides from solution. Sorption of pesticides in reconstituted cuticular wax (wax/water partition coefficients) of Chenopodium album L. and in isolated cuticular membranes (cuticle/water partition coefficients) of Prunus laurocerasus L. was determined. Diffusion coefficients of pesticides in reconstituted cuticular wax of C. album leaves were size-dependent, increasing with increasing molar volume. In the presence of alcohol ethoxylates, diffusion coefficients were enhanced by up to two orders of magnitude, and size selectivity was significantly decreased. The accelerating effect and the decrease in size selectivity were attributed to plasticisation of the cuticular wax by the alcohol ethoxylates increasing the fluidity in the wax. A free volume model adopted from polymer science was successfully applied to predict diffusion coefficients of pesticides on the basis of the transport properties of the wax (size selectivity and crystallinity), the molar volume of the diffusing compound and the accelerator concentration in the wax. SN - 1526-498X UR - https://www.unboundmedicine.com/medline/citation/16308869/Modelling_the_effects_of_alcohol_ethoxylates_on_diffusion_of_pesticides_in_the_cuticular_wax_of_Chenopodium_album_leaves_ L2 - https://doi.org/10.1002/ps.1139 DB - PRIME DP - Unbound Medicine ER -