The aim of this study was to test the differences in infection by Pyrenophora teres of 22 varieties of spring barley grown under the same conditions. The occurrence of symptoms of the disease was evaluated on plants grown in the greenhouse from seeds collected in the field experiment. Barley infection by P. teres was assessed at two dates: in the middle of June and at the beginning of July. Higher infection of plants and higher percentage of infected plants were observed in the second date. Varieties: Atico, Basza, Boss, Conchita, Kormoran and Start were infected in the smallest degree. Disease occurrence in the greenhouse was low and on average for all varieties amounted to 1.9% of infected seedlings. Plant infection of particular cultivars in the field and greenhouse was different.
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