Published in Scientific Papers. Series B, Horticulture, Vol. LXVI, Issue 1
Written by Silvena TODOROVA, Petko MINKOV, Teodora MIHOVA
The behavior of plum varieties grown in Dryanovo Experimental Station for the period 2018-2020 to the economically important diseases of the plum (Polystigma; Monilinia fructigena; Stigmina carpophila, Tranzschelia-pruni spinosae) was studied. Sensitive to red leaf spots were the plum varieties Yoyo, Chachanska lepotitsa, Chachanska najbolie and Nevena, according to the Stanley standard (slightly sensitive). With regard to late brown rot and powdery mildew, a high degree of sensitivity manifested variety Tegera. Nevena and Balvanska Slava proved to be practically resistant to these diseases. Plum rust tolerant plums (Tranzschelia-pruni spinosae) include the varieties Yoyo, Balvanska Slava, Nevena, Gabrovska, Tegera and Hanita. From the study on the conditions of Dryanovo, Bulgarian varieties show low to medium susceptibility to economically important diseases.
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