Published in Scientific Papers. Series B, Horticulture, Vol. LXV, Issue 1
Written by Boryana STEFANOVA, Petko MINKOV, Georgi POPSKI
The study was conducted in the period 2017-2019 in an intensive plum plantation of the RIMSA Troyan. The susceptibility of the rootstock combinations to Polistigma rubrum (Persoon) De Candolle, Tranzschelia pruni spinose (Persoon) Dietel, Stigmina carpophila (Lev Ellis) was studied. The infectious process of infection and development was monitored and the degree of attack of Polistigma rubrum (Persoon) De Candolle, Tranzschelia pruni spinose (Persoon) Dietel, Stigmina carpophila (Lev Ellis), in plum rootstock combinations for the climatic conditions of the region of Troyan were reported. The climatic factors - temperature and precipitation during the infection and manifestation of the diseases have a significant influence on the degree of damage. Studies have found that in all treatments of the study, the highest values for the degree of attack of Polistigma rubrum (Persoon) De Candolle, Tranzschelia pruni spinose (Persoon) Dietel, Stigmina carpophila (Lev Ellis) were reported for 2019, due to the fact that the year is characterized by heavy and prolonged rainy periods, especially the month of June (234.6mm). During the 3 years of the study, the rootstock combinations with Wavit were characterized by a high attack index for the three diseases Polistigma rubrum (Persoon) De Candolle, Tranzschelia pruni spinose (Persoon) Dietel, Stigmina carpophila (Lev Ellis). Stigmina carpophila occurs exclusively in the treatments with Brompton for the cultivars 'Hanita’ and 'Stanley’ and in the rootstock Wavit in 'Cacanska Lepotica’ and 'Jojo’. The lowest degree of attack has the cultivar 'Hanita’ (average 23%), and the highest is in 'Cacanska Lepotica’ on Wavit (46.4%).
[Read full article] [Citation]
