Control of Fungal Storage Rots of Apples by Hot-Water Treatments: A Northern European Perspective

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In the Lower Elbe region of Northern Germany and in other Northern European fruit production areas, about 80 % of all storage rots of apples are caused by Neofabraea alba and N. perennans. Other pathogens include Colletotrichum acutatum, Monilinia fructigena, Phaci-diopycnis washingtonensis, Neonectria galligena, Botrytis cinerea, Penicillium expansum and Fusarium avenaceum. Hot-water treatments of freshly harvested fruits for 3 min at 50-52 °C gave high efficacies against most of these storage rots except F. avenaceum. Substantial evidence supported a heat shock-induced antimicrobial response rather than a direct killing of fungal inoculum as the principal mode of action of hot-water treatments in apples. Shorter exposures for < 30 s at 55-60 °C also provided good control of fungal storage rots and thereby offer new possibilities for this technology in Northern European fruit production. These possibilities include the integration of a hot-water unit into existing grading lines and the option to treat fruits at different time points, e.g. at harvest, after short-term storage and/or after long-term storage.

OriginalsprogEngelsk
TidsskriftErwerbs - Obstbau
Vol/bind56
Nummer1
Sider (fra-til)25-34
Antal sider10
ISSN0014-0309
DOI
StatusUdgivet - 1 mar. 2014

    Forskningsområder

  • Apple, Denmark, Heat shock, Hot water treatment, Neofabraea, Northern Germany, Organic production, Penicillium expansum, Pesticide residues, Storage disease

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