Evaluating variations of Ulmus carpinifolia var. umbelifera tree wood against wood decay fungi in urban forestry in Isfahan Township

Abstract Urban trees are valuable storage in the metropolitan areas. Trees are often subjected to abiotic factors agents such as fungi, bacteria, insects, etc, which lead to destroy mechanicals strength and decline mechanical properties vulnerability diseases. The objective of this study was to determine the potential degradation of Ulmus tree by wood decay fungi. Results indicated that the degradation of samples increased with increase the incubation time. Visual observations Ulmus trees of Hasht Behesht Isfahan Park was featureswas record, also wood decay fungi was collected. And after 4 and 8 weeks, Mass Loss (ML) and impact bending were measured. Also, optical microscopy analysis was performed to investigate the fungal degradation pattern. Statistical analysis was performed using SPSS software. Mass Loss (ML) , increased after 8 weeks incubation as compared to 4 weeks. Mass loss , in heartwood was less than sapwood. Also, microscopic analysis elustrated deteriration with properties of simultaneous white-rot.