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Title:
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Suppression of Botrytis cinerea on necrotic grapevine tissues by early season applications of natural products and biological control agents
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Author:
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Calvo Garrido, Carlos; Viñas Almenar, Inmaculada; Elmer, Philip AG; Usall i Rodié, Josep; Teixidó i Espasa, Neus
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Notes:
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BACKGROUND: Necrotic tissues within grape (Vitisvinifera) bunches represent an important source of Botrytiscinerea
inoculum for Botrytis bunch rot (BBR) at harvest in vineyards. This research quantified the incidence of B.cinerea
on necrotic floral and fruit tissues and the efficacy of biologically based treatments for suppression of B. cinerea secondary inoculum within developing bunches.
RESULTS: At veraison (2009 and 2010), samples of aborted flowers, aborted fruits and calyptras were collected, and the
incidence and sporulation of B. cinerea
were determined. Aborted fruits presented significantly higher incidence in untreated
samples. Early-season applications of
Candida sake plus Fungicover, Fungicover alone or Ulocladium oudemansii significantly
reduced B. cinerea incidence on aborted flowers and calyptras by 46 – 85%. Chitosan treatment significantly reduced B. cinerea
incidence on calyptras. None of the treatments reduced B.cinerea incidence on aborted fruits. Treatments significantly reduced sporulation severity by 48% or more.
CONCLUSIONS: Treatments were effective at reducing B. cinerea secondary inoculum on necrotic tissues, in spite of the variable
control on aborted fruits. This is the first report to quantify B. cinerea on several tissues of bunch trash and to describe the effective suppression of saprophytic
B. cinerea inoculum by biologically based treatments.
The authors would like to thank the University of Lleida for Carlos Calvo-Garrido’s PhD grant and organic production research project, the European Union (INTERREG REDBIO project) for their
financial support and the Catalan Government for Dr Philip Elmer’s travel assistance grant. Thanks also to Plant and Food Research for assistance with living expenses while at IRTA. |
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Subject(s):
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-Biological control
-Candida sake CPA-1
-Chitosan
-Vitis vinifera |
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Rights:
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(c) Society of Chemical Industry, 2013
info:eu-repo/semantics/restrictedAccess |
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Document type:
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Article
Article - Published version |
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Published by:
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Wiley
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