Beitrag in Konferenzband
Effect of viticultural practices and sprayer technology on the level pesticide residues in grapevine berries, must and wine.


Details zur Publikation
Autorenliste: Stoll M., Blum M., Fehse W., Stern G., Heinzler M., Reineke A., Baus O., Keicher R., Bäcker G., Schwarz H.-P., Gaubatz B., Seckler J., Freund M.M.
Jahr der Veröffentlichung: 2010
DOI: 10.17660/ActaHortic.2013.978.23
Sprachen: Englisch

Abstract

Producer and consumer demand for improved wine quality has driven
substantial amendments in the application of good agricultural
practices.
To enable high quality production, removal of leaves within the bunch
zone has become common practice to enhance sunlight exposure to the
cluster zone.
Therefore, bunches as target areas are now better exposed compared to
previous viticultural practices.
To date, the effect of these new production techniques on residues in
berries and wine has not been thoroughly studied yet.
The aim of this project was to evaluate the level of fungicide residues
obtained under different grades of bunch exposure and under use of
different spray application techniques.
Additionally, residue level during different stages of wine production
was to be assessed.
Three different levels of leaf defoliation practices and two different
commercial types of sprayers were included in this study.
In all treatments active ingredients of the respective fungicides were
detected on the berries.
However, all samples were below the maximum residue level (MRL) defined
for table grapes.
The leaf removal treatments and the two air stream blower types showed
different effects on the concentration of plant protection agents and
their active ingredients, respectively.
Concentrations of most agents declined below the detection level during
the winemaking process, except for the active ingredients dimethomorph
(control of Plasmopara viticola) und pyrimethanil (control of Botrytis cinerea), which were still detectable in the wine.
However, the level of both was below the MRL.