Influence on grape aromatic compounds of natural fungicides used for the control of downy mildew

BACKGROUND The grape volatile fraction determines to a great extent its aroma, which is one of the most important characteristics influencing wine quality and consumer preferences. Grapevine downy mildew (GDM) is one of the most important and devastating diseases of grapevines worldwide. In this stu...

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Bibliographic Details
Published in:Journal of the science of food and agriculture 2022-08, Vol.102 (11), p.4570-4576
Main Authors: Pérez‐Álvarez, Eva P., Marinozzi, Sofia, Garde‐Cerdán, Teresa, Romanazzi, Gianfranco
Format: Article
Language:English
Subjects:
Airborne microorganisms
Alcohols
Aroma
Aroma compounds
Aromatic compounds
Chemical composition
Chitosan
Copper
Downy mildew
Formulations
Fruits
Fungicides
grape
Grapes
Grapevines
Health problems
Heavy metals
Verdicchio
Vitaceae
volatile composition
Volatile compounds
Wineries
Wines
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Summary:BACKGROUND The grape volatile fraction determines to a great extent its aroma, which is one of the most important characteristics influencing wine quality and consumer preferences. Grapevine downy mildew (GDM) is one of the most important and devastating diseases of grapevines worldwide. In this study, the impact on the volatile composition of cv. Verdicchio grapes of classical copper formulations, was compared to that of alternative products. Thus, 11 treatments were foliar applied throughout one grapevine cycle. RESULTS Most of the volatile compounds present in the grapes were not affected by the treatments used in order to prevent GDM. In the case of the total C13 norisoprenoids, some differences were found between grapes untreated control and those applied with the grapefruit seed extract. Moreover, the content of alcohols was smaller in grapes from Bordeaux mixture treatment and higher in the samples from chitosan application. CONCLUSION Therefore, from the qualitative point of view of the berry, treatment with tested products alternative to copper is recommended, which minimize the environmental and health problems that this heavy metal brings to the soil and in the winery, since it means that their applications did not affect the grape aroma. © 2022 Society of Chemical Industry.
ISSN:0022-5142
1097-0010
DOI:10.1002/jsfa.11814