45 research outputs found
Effects of copper fungicide spraying on volatile thiols of the varietal aroma of Sauvignon blanc, Cabernet Sauvignon and Merlot wines
Get PDFIn a three-year experiment, the effect of pre-veraison copper sprayings of vines on must composition and some volatile thiols contributing to the varietal aroma of Sauvignon blanc, Cabernet Sauvignon and Merlot wines was studied in comparison with folpet sprayings in the Bordeaux winegrowing region. The readivity of copper residues with thiols, mainly during the alcoholic fermentation, had a dramatic effect on the concentration of 4-mercapto-4-methylpentan-2-one and 3-mercaptohexanol in wines. However, copper sprayings, preferentially on the foliage, did not significantly increase copper residues in must; thiol concentrations in wines were very close to those found in wines obtained from vines sprayed with folpet. Therefore, this mode of spraying can be used to avoid the effects of copper treatment at veraison on the volatile thiols of the wines varietal aroma.
L'excoriose de la vigne : recherches sur le Phomopsis viticola Sacc. Nouvelles possibilites de lutte
No full textNational audienc
L'influence des traitements anti-mildiou et de la récolte mécanique sur l'état sanitaire des bois
No full textL'influence des traitements anti-mildiou et de la récolte mécanique sur l'état sanitaire des boi
Donnees nouvelles sur l'epidemiologie de l'excoriose : consequences pour la lutte
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Des precisions sur le Folpel pour la protection de la vigne contre l'excoriose, le black-rot, le mildiou, l'oidium et la pourriture grise
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Des essais pratiques de lutte contre l'excoriose sur le vignoble AOC Cahors
No full textDes essais pratiques de lutte contre l'excoriose sur le vignoble AOC Cahor
Comment raisonner une strategie de traitements en fonction du mode d'action des fongicides
No full textNational audienc
