Black dot (Colletotrichum coccodes) as a new threat to potato plantation
Jerzy Osowski
j.osowski@ihar.edu.plInstytut Hodowli i Aklimatyzacji Roślin, Radzików, Zakład Nasiennictwa i Ochrony Ziemniaka, Bonin (Poland)
Abstract
Black dot is a tuber blemish and foliar disease of potato caused by the fungus Colletotrichum coccodes (Wallr.) S. J. Hughes (synonyms C. atramentarium (Berk. & Br. Taub) and C. phomoides). It is common in most potato growing areas in the world and may cause up to 30%–75% yield reduction on susceptible cultivars. Colletotrichum coccodes can colonize all underground parts (daughter tubers, stolons and roots), basal stems and foliage of potato plants. The typical symptoms of the disease are small black sclerotia on the roots, stems, stolons, and progeny tubers of infected plants. The relative importance of Colletotrichum coccodes on potato has increased, in part due to the growing market for fresh, prepacked potatoes, which has resulted in an increase in the demand for washed potatoes with a high-quality appearance.
Keywords:
Colletotrichum coccodes, black dot, symptomsReferences
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Authors
Jerzy Osowskij.osowski@ihar.edu.pl
Instytut Hodowli i Aklimatyzacji Roślin, Radzików, Zakład Nasiennictwa i Ochrony Ziemniaka, Bonin Poland
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