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Influence on grape aromatic compounds of natural fungicides used for the control of downy mildew
Author(s) -
PérezÁlvarez Eva P.,
Marinozzi Sofia,
GardeCerdán Teresa,
Romanazzi Gianfranco
Publication year - 2022
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.11814
Subject(s) - downy mildew , fungicide , vineyard , aroma , plasmopara viticola , bordeaux mixture , winemaking , wine , horticulture , winery , berry , viticulture , chemistry , aroma of wine , food science , biology
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 C 13 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 The Authors. Journal of The Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry