Professor of Plant Pathology
College of Agricultural Sciences
Email: 
ddd2@psu.edu
Phone number(s): 
(814) 865-1689
Office Address: 
323 Buckhout Laboratory
Biographical: 

My general projects are directed towards determining the etiology of hardwood tree diseases and evaluating forest health in the Northeast. Specific current projects include: relative susceptibility of forest plants to ozone; temporal and spatial trends of mercury accumulation in the forest; biocontrol of artillery fungi (Sphaerobolus spp.) using spent mushroom compost; and biocontrol of tree-of-heaven (Ailanthus altissima) using Verticillium. Teaching activities include the undergraduate course “Diseases of Forest and Shade Trees” and giving guest lectures.

PSIEE Research Theme: 
Water and Biogeochemical Cycles
Research Summary: 

Health of hardwood forests, hardwood tree fungal pathogens and etiology of hardwood tree diseases, susceptibility of forest plants to ozone, temporal and spatial trends of mercury accumulation in the forest, biocontrol of artillery fungi (Sphaerobolusspp.) using spent mushroom compost, and biocontrol of tree-of-heaven (Ailanthus altissima) using Verticillium.