[Fungal diseases of unconventional horticultural plants]
2006
Sementsova, T.N.,National Academy of Sciences. Scientific and Practical Center for Potato, Vegetable and Fruit Growing (Belarus). Institute for Fruit Growing
The species structure and symptoms of fungal diseases on mountain ash and black chokeberry were studied. Phyllosticta leaf spot (causal agent – Phyllosticta sorbi), rust (Gymnosporangium juniperi) and brown rot (causal agent – Monilia aucuparia) were widespread on mountain ash, meanwhile black chokeberry was attacked by Phyllosticta leaf spot. 14 introduced varieties of mountain ash and 2 varieties of black chokeberry were estimated on the level of resistance to fungal diseases. One variety less susceptible to Phyllosticta leaf spot, 5 varieties relatively resistant to rust, 4 less susceptible to brown rot were selected among mountain ash varieties. One black chokeberry variety less susceptible to Phyllosticta leaf spot was selected. In 2004 the moderate development of Phyllosticta leaf spot has been pointed out up to 50 %, whereas in 2005 it was characterized by ephitotic development of illness (100%). Almost all studied varieties except Red Tip have shown a high degree of a susceptibility to an causal agent. Brown rot (causal agent – Monilia aucuparia). Years of research were characterized by the moderate development of disease. Immune and comparative stable varieties to diseases it is not revealed. In a weak degree fruits at varieties Dubolostnaya, Granatnaya, Koncentra, Coral Beauty have been affected. In average degree there were varieties Alaya krupnaya, Burka, Nevezhinskaya krasnaya, Rozina, Rubinovaya, Pink and Red Tip. Maravskaya variety was related to the group of hard affected varieties
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