First Report of Brown Rot in Wine Grapes Caused by Monilinia fructicola in Canada

Plant Disease
P L SholbergH Boulay

Abstract

A survey was conducted in 2001 and 2002 to determine incidence of fruit pathogens in wine grapes (Vitis vinifera), an important crop in the southern interior of British Columbia (BC), Canada. Grape clusters were sampled every 2 weeks from June to October at eight vineyard sites located from Osoyoos in the south to Kelowna, approximately 100 km to the north. In the laboratory, the berry clusters were surface disinfested for 0.5 min in 70% ethanol, followed by 1 min in 0.5% sodium hypochlorite, and rinsed twice in sterile distilled water. The berries were placed on potato dextrose agar (PDA) amended with 15 ml/liter of 85% lactic acid and incubated at 20°C for 1 week. During the 2002 survey, a fungus resembling Monilinia fructicola (G. Wint.) Honey was observed sporulating on immature 'Pinot noir' grapes from Kelowna that were sampled on 14 August. Later in the growing season, a similar fungus was detected on 'Riesling' grapes from Summerland sampled on 11 September. There was no evidence of brown rot near the vineyard in Kelowna, but diseased stonefruit were present near the vineyard in Summerland. Subsequent identification of the fungus from 'Riesling' as M. fructicola was based on morphological characters and DNA sequence data...Continue Reading

Citations

May 3, 2016·Journal of Agricultural and Food Chemistry·Leandro Oliveira LinoBénédicte Quilot-Turion

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