This study evaluated commercial olive cultivars for resistance to olive leaf spot (OLS). A growth chamber trial was undertaken with one temperature treatment (16°C) applied during inoculation while a relative humidity (RH) of above 80% was maintained. Plants were kept for 48 hours at 99% RH after inoculation and then moved to shade netted area for disease development at a temperature of 25±5°C. The results were used for categorizing the eight olive cultivars evaluated in this study according to their OLS susceptibility. ‘Frantoio’ was categorized as most tolerant; ‘Nandi’ and ‘Leccino’ were found to be moderately tolerant, and ‘Nocellara del Belice’ fairly tolerant. ‘Coratina’ was found to be the most susceptible cultivar; Barouni was found to be moderately susceptible, and ‘Mission’ and ‘Manzanilla de Seville’ were found to be fairly susceptible. The findings provide a basis for preliminary recommendations of OLS tolerant cultivars and selections for commercial olive production.
Msimango, Zakhele Cyril
"Screening of Olive Cultivars for Tolerance to Fusicladium Oleagineum in South Africa,"
Professional Agricultural Workers Journal:
Available at: https://tuspubs.tuskegee.edu/pawj/vol3/iss1/12