REACTION OF SOME PLUM CULTIVARS TO NATURAL INFECTION WITH Taphrina pruni (Fuck.) Tul., Fusicladium Pruni DUCOMET AND Tranzschelia pruni-spinosae PERSOON DIETEL
AbstractThe response to the attack of Taphrina pruni (Fuck.) Tul., Fusicladium pruni Ducomet and Tranzschelia pruni-spinosae Persoon Dietel , in natural conditions of infection of 13 plum cultivars were evaluated, during three years, in a commercial orchard located at Calacea, Salaj county, Romania, in 2012-2014. The cultivars taken into study were â€˜Topfirstâ€™, â€˜Nectarina rosieâ€™, â€˜Tuleu timpuriuâ€™, â€˜Hangataâ€™, â€˜Toptasteâ€™, â€˜Tuleu grasâ€™, â€˜Vinete de Italiaâ€™, â€˜Stanleyâ€™, â€˜Vinete romanestiâ€™, â€˜Tophitâ€™, â€˜Jojoâ€™,â€˜Anna Spathâ€™, â€˜Topendâ€™. The highest degree of attack of Taphrina pruni, on fruits in â€˜Vinete romanestiâ€™ â€˜Stanleyâ€™ and â€˜Vinete de Italiaâ€™ was recorded and the most resistant cultivars were â€˜Topendâ€™, â€˜Jojoâ€™, â€˜Tophitâ€™, â€˜Tuleu timpuriuâ€™and â€˜Topfirstâ€™.The most resistant cultivars regarding the attack of Fusicladium pruni Ducomet proved to be â€˜Topfirstâ€™, â€˜Topendâ€™, â€˜Jojoâ€™, â€˜Tophitâ€™, â€˜Hangataâ€™ followed by â€˜Anna SpÃ¤thâ€™, â€˜Toptasteâ€™, â€˜Vinete romanestiâ€™ and â€˜Stanleyâ€™ respectively the highest degree of attack on â€˜Tuleu grasâ€™, â€˜Nectarina rosieâ€™, â€˜Tuleu timpuriuâ€™ and â€˜Vinete de Italiaâ€™ , was observed. Regarding the plum rust (Tranzschelia pruni-spinosae Persoon Dietel) the cultivars having the lowest degree of attack were â€˜Jojoâ€™, â€˜Tophitâ€™, â€˜Topendâ€™, â€˜Anna SpÃ¤thâ€™, â€˜Toptasteâ€™, â€˜Tuleu grasâ€™ and â€˜Nectarina rosie. The most sensitive cultivars to Plum Rust proved to be â€˜Vinete romanestiâ€™ and â€˜Tuleu timpuriuâ€™ followed by â€˜Nectarina rosieâ€™, â€˜Vinete de Italiaâ€™ and â€˜Stanleyâ€™. The low level of infections in some cultivars represents an element that recommends them in breeding programs on resistance to these diseases of plum.
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