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Effects of poly- and monodisperse surfactants on 14C-epoxiconazole diffusion in isolated cuticles of Prunus laurocerasus.
Pest Manag Sci 2013; 69(4):512-9PM

Abstract

BACKGROUND

Surfactants are known to enhance the foliar uptake of agrochemicals. It was the aim of this study to compare the enhancing effect of three polydisperse surfactants (Brij 30, Plurafac LF300 and Wettol LF700) and five monodisperse alcohol ethoxylates (C12 E3, C12 E4, C12 E5, C12 E6 and C12 E8) on (14)C-epoxiconazole diffusion in cuticles isolated from cherry laurel (Prunus laurocerasus L.).

RESULTS

Rate constants (k*) of (14) C-epoxiconazole diffusion were measured in the presence and in the absence of the surfactants. Polydisperse surfactants increased the rates of foliar penetration of (14) C-epoxiconazole by factors of between 8 and 16. With monodisperse surfactants, enhancing effects on cuticular penetration were 2-16-fold. Effects were highest with alcohol ethoxylates of intermediate size, whereas they were lower for the smaller, more lipophilic and the larger, more polar monomers. In addition, diffusion of four monodisperse alcohol ethoxylates (C12 E3, C12 E4, C12 E5 and C12 E6) across cuticles was measured. Rate constants of alcohol ethoxylates decreased with decreasing lipophility and increasing molecular weight.

CONCLUSION

The results indicate that enhancement of foliar penetration across cuticles by surfactants was most efficient when both (14)C-epoxiconazole and surfactants had similar mobilities in the transport-limiting barrier of the cuticles. This observation should be of interest in future strategies to optimise foliar uptake of agrochemicals using surfactants.

Authors+Show Affiliations

Institute of Cellular and Molecular Botany, Department of Ecophysiology, University of Bonn, Bonn, Germany.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Evaluation Studies
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

23044821

Citation

Gutenberger, Andrea, et al. "Effects of Poly- and Monodisperse Surfactants On 14C-epoxiconazole Diffusion in Isolated Cuticles of Prunus Laurocerasus." Pest Management Science, vol. 69, no. 4, 2013, pp. 512-9.
Gutenberger A, Zeisler VV, Berghaus R, et al. Effects of poly- and monodisperse surfactants on 14C-epoxiconazole diffusion in isolated cuticles of Prunus laurocerasus. Pest Manag Sci. 2013;69(4):512-9.
Gutenberger, A., Zeisler, V. V., Berghaus, R., Auweter, H., & Schreiber, L. (2013). Effects of poly- and monodisperse surfactants on 14C-epoxiconazole diffusion in isolated cuticles of Prunus laurocerasus. Pest Management Science, 69(4), pp. 512-9. doi:10.1002/ps.3402.
Gutenberger A, et al. Effects of Poly- and Monodisperse Surfactants On 14C-epoxiconazole Diffusion in Isolated Cuticles of Prunus Laurocerasus. Pest Manag Sci. 2013;69(4):512-9. PubMed PMID: 23044821.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of poly- and monodisperse surfactants on 14C-epoxiconazole diffusion in isolated cuticles of Prunus laurocerasus. AU - Gutenberger,Andrea, AU - Zeisler,Viktoria V, AU - Berghaus,Rainer, AU - Auweter,Helmut, AU - Schreiber,Lukas, Y1 - 2012/10/09/ PY - 2012/01/18/received PY - 2012/05/08/revised PY - 2012/08/20/accepted PY - 2012/10/10/entrez PY - 2012/10/10/pubmed PY - 2013/9/13/medline SP - 512 EP - 9 JF - Pest management science JO - Pest Manag. Sci. VL - 69 IS - 4 N2 - BACKGROUND: Surfactants are known to enhance the foliar uptake of agrochemicals. It was the aim of this study to compare the enhancing effect of three polydisperse surfactants (Brij 30, Plurafac LF300 and Wettol LF700) and five monodisperse alcohol ethoxylates (C12 E3, C12 E4, C12 E5, C12 E6 and C12 E8) on (14)C-epoxiconazole diffusion in cuticles isolated from cherry laurel (Prunus laurocerasus L.). RESULTS: Rate constants (k*) of (14) C-epoxiconazole diffusion were measured in the presence and in the absence of the surfactants. Polydisperse surfactants increased the rates of foliar penetration of (14) C-epoxiconazole by factors of between 8 and 16. With monodisperse surfactants, enhancing effects on cuticular penetration were 2-16-fold. Effects were highest with alcohol ethoxylates of intermediate size, whereas they were lower for the smaller, more lipophilic and the larger, more polar monomers. In addition, diffusion of four monodisperse alcohol ethoxylates (C12 E3, C12 E4, C12 E5 and C12 E6) across cuticles was measured. Rate constants of alcohol ethoxylates decreased with decreasing lipophility and increasing molecular weight. CONCLUSION: The results indicate that enhancement of foliar penetration across cuticles by surfactants was most efficient when both (14)C-epoxiconazole and surfactants had similar mobilities in the transport-limiting barrier of the cuticles. This observation should be of interest in future strategies to optimise foliar uptake of agrochemicals using surfactants. SN - 1526-4998 UR - https://www.unboundmedicine.com/medline/citation/23044821/Effects_of_poly__and_monodisperse_surfactants_on_14C_epoxiconazole_diffusion_in_isolated_cuticles_of_Prunus_laurocerasus_ L2 - https://doi.org/10.1002/ps.3402 DB - PRIME DP - Unbound Medicine ER -