Survey Some Efficacious Factors on Mistletoe Infection Intensity In Forest Ecosystems in Central Zagros

The purpose of this study was to investigate the influence of tree canopy density, DBH (Diameter breast height), vertical crown classes (upside, amid and beneath), physiographic factors (elevation, aspect and slope) on mistletoe infection intensity in central Zagros forest ecosystems in the north of Ilam, Bankol region (approximately 120 ha). For this study, random systematic method and 62, 1000 square meter plots were selected. Results showed that foothill direction had significant effect on infection intensity, while elevation and slope percentage hadn’t any effect of infection. Most numbers of mistletoes was in southern direction. Results also showed that vertical crown classes had significant effect on infection and upside crown had high infection both for Quercus brantii and Acer monspessulanum. Maximum infection intensity was in region with canopy opening innuendo 0-25%.The results indicated that most infection has happened in middle DBH classes namely 30,35,40.In this region Quercus brantii and Acer monspessulanum with 80% and 16% have had most shrub numbers of mistletoe.