Prevalence and management of alkyl-methoxypyrazines in a changing climate: Viticultural and oenological considerations

Gary J. Pickering, Jim Willwerth, Andreea Botezatu, Margaret Thibodeau

    Research output: Contribution to journalReview articlepeer-review

    1 Citation (Scopus)
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    Abstract

    Alkyl-methoxypyrazines are an important class of odor-active molecules that contribute green, ‘unripe’ characters to wine and are considered undesirable in most wine styles. They are naturally occurring grape metabolites in many cultivars, but can also be derived from some Coccinellidae species when these ‘ladybugs’ are inadvertently introduced into the must during harvesting operations. The projected impacts of climate change are discussed, and we conclude that these include an altered alkyl-methoxypyrazine composition in grapes and wines in many wine regions. Thus, a careful consideration of how to manage them in both the vineyard and winery is important and timely. This review brings together the relevant literatures on viticultural and oenological interventions aimed at mitigating alkyl-methoxypyrazine loads, and makes recommendations on their management with an aim to maintaining wine quality under a changing and challenging climate.

    Original languageEnglish
    Article number1521
    Pages (from-to)1-19
    Number of pages19
    JournalBiomolecules
    Volume11
    Issue number10
    DOIs
    Publication statusPublished - 15 Oct 2021

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