DIGITALNA ARHIVA ŠUMARSKOG LISTA
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ŠUMARSKI LIST 5-6/2022 str. 91     <-- 91 -->        PDF

from infected trees were placed in specially prepared paper boxes and brought to the laboratory for microscopic identification. Traditional methods for entomological and phytopathological identification were used. Additional isolation of the fungal pathogens in suitable standard agar media and studying the cultural characteristics such as colony morphology, colour and production of asexual structures, were carried-out. Slide mounts of specimens were prepared for observation using microscope (NIKON, ECLIPSE, E400) in order to confirm fungal identification. Morphological characteristics of spores were the major means of identification using several taxonomic keys (Barnett and Hunter, 1972; Sutton, 1980; Sinclair, 2005).
Inspection covered all plant parts and any existing insect stage(s) or infestation symptoms were identified on-site if possible. In case of uncertainty, samples of the occurring insects in different stage(s) were transferred in suitable containers to the laboratory for identification using several taxonomic keys (Johnson and Lyon, 1991; Mihajlović, 2008). Data from the completed tree inventory was transferred to Microsoft Excel for data summarization. Also, for each tree species both the distribution and the entire classification were included (Phylum, Class, Order, Family).
RESULTS
REZULTATI
The inventoried population included 444 trees belonging to 43 families. The three most represented families were Pinaceae with 21 species (86 trees, 19.4% of the inventoried population), followed by Cupressaceae with 16 species (70 trees, 15.8%), and Rosaceae with 18 species (33 trees, 7.4%). The most dominant genus by the number of species within Dendropark was Acer with 7 species followed by Pinus and Quercus with 6 species, and Abies, Juniperus and Picea with 5 species by genus. The most numerous species was Platanus orientalis L. with 22 trees.
The health condition of each tree was recorded according to the categories adapted from the rating system established by the International Society of Arboriculture® (ISA).
In the excellent condition class no tree was assessed. Only 1.8% of the population were rated in very good condition, belonging to family Ginkgoaceae (Ginkgo biloba L.), Pinaceae (Cedrus atlantica (Endl.) Manetti ex Carriere, Abies alba Mill.), Rosaceae (Prunus serrulata Lindl.), Oleaceae (Forsythia europaea Degen & Bald) and Berberidaceae (Berberis julianiae Schneid.). Trees in this category looked healthy and satisfactory in condition, vigour, and form. The trees had no major structural problems, but had insignificant aesthetic problems.
In the good condition class one hundred and fifty trees (33.8%) were rated and over half of these trees had structural defects or codominant stems. Other common issues included powdery mildews, aphids and mechanical damage. In this category, the most represented were trees from the family Platanaceae (21 individuals), Pinaceae (18) and Cupressaceae (15) family. The fungal pathogens causing powdery mildew were registered on leaves of trees from genera Quercus, Berberis and Acer: Microsphaera alphitoides Griffon & Maubl., M. berberidicola F.L. Tai and Uncinula aceris (DC.) Sacc. Symptoms of necrotic leaf spots caused by Mycosphaerella mori (Fuckel) F.A.Wolf were observed on mulberry plants (Morus alba L.) and leaf spots caused by Septoria alni Sacc. on Alnus sp.