Author/Authors :
Safari Motlagh Mohammad Reza نويسنده Department of Plant Pathology, Faculty of Agriculture, Rasht Branch, Islamic Azad University, Rasht, Guilan Province, PO box 41335-3516, Iran , Bayegan Seyedeh Zahra نويسنده Graduated Master of Science in Horticulture, Ornamental Plants, Rasht Branch, Islamic Azad University, Rasht, Guilan Province, Iran
Abstract :
Euonymus spp. (L.) are some of the most important ornamental plants.
Fungal plant pathogens of ornamental plants are the most important factors
causing damage. In this research two pathogenic fungal species were isolated
from naturally infected Euonymus species and identified. In order to isolation
of fungi from disease tissues, the obtained samples were cultured on potato
dextrose agar medium. Isolates were cultured due to sporulation on water
agar medium. Morphological characters of isolates were studied in order to
identify the taxonomy. According to the results, isolates were belonged to
Phoma sp. and Colletotricum gloeosporioides. Pathogenicity test of isolates
was done in desiccators, and revealed the pathogenicity levels of these fungi
and their ability to cause leaf blight on Euonymus spp. This reaction occurred
as complete random design (CRD) with eight treatment and three replications.
Based on the variance analysis, there was not any significant difference in the
disease rating of studying fungi. But based on the sizes and types of the spots
appeared on the Euonymus spp. and Horsfall-Barratt system, plants were
more affected by the Phoma sp. compared with C. gloeosporioides., and its
disease rating was higher and plants showed less tolerance.
