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Preliminary study regarding the healthy state of some decorative trees from the University and N. Balcescu Parks of Oradea (Romania)

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Author(s): Teodora STURZ | Diana CUPSA

Journal: Analele Universitatii din Oradea, Fascicula Biologie
ISSN 1224-5119

Volume: TOM XIII;
Start page: 75;
Date: 2006;
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Keywords: healthy state | ornamental tree | phytopathogenic agent

ABSTRACT
During the present study we wanted to evaluate the diseases and pests of the ornamental tree species from University and Balcescu parks. From these two parks we have collected samples in three periods of the year – may, June and September. The samples consist from attacked leaves of 16 species of ornamental tree and shrub species. On the leaves collected in May we observed the presence of some attacks in the shape of small blurs or orifices. In June we have noticed the increase of the number of blurs and their dimensions were bigger. In September the blurs are more confluent covering almost the whole leaf. The attacked leaves roll up and they fall early. We determined a number of 7 types of diseases produced by bacteria, fungi or insects.
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