Incidence and survival of Pyrenophora avenae in New Zealand seed oats

In a survey of New Zealand seed oats, extending from 1965 to 1972 inclusive, Pyrenophora avenae was detected each year, infection ranging from 17 to 57% of the samples. The coloured cultivars Algerian, Winter Grey, Black Supreme, and Black were more heavily infected than the others. P. avenae was still viable on seed stored in the laboratory for 7 years.