Micromycetes colonizing and damaging leaves of evergreen rhododendron (Rhododendron L.) in nursery
2015
Kowalik, Maria | Kierpiec-Baran, Barbara | Duda-Franiak, Klaudia
In May and October 2010–2012, mycological studies were conducted on 10 cultivars of rhododendron bushes growing in containers in the nursery of ornamental plants. Out of 3000 specimens of infested leaf fragments, 2566 fungal colonies belonging to 41 species were isolated. The following species colonizing the leaves and causing their necrosis were extracted in the largest number of colonies: Alternaria alternata, Aspergillus niger, Epicoccum nigrum, Humicola grisea, Pestalotiopsis sydowiana, Phoma pomorum, Sordaria fimicola, Trichoderma koningii, Trichoderma polysporum, Truncatella truncata, Umbelopsis isabellina and others. The research showed that the micromycetes colonies colonizing and damaging rhododendron leaves varied in species composition and number of colonies in different years and at different times. The study determined which rhododendron cultivars were characterized by good health and which had the greatest susceptibility to infection by micromycetes.
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