VIEW ARTICLE

The Development of Hypoxylon Canker of Populus tremuloides: Role of Interacting Environmental Factors. Davinderjit K. Bagga, Former Research Assistant, Department of Plant Pathology, University of Wisconsin, Madison 53706; Eugene B. Smalley, Professor, Department of Plant Pathology, University of Wisconsin, Madison 53706. Phytopathology 64:658-662. Accepted for publication 26 November 1973. DOI: 10.1094/Phyto-64-658.

Any factor which contributed to host-moisture stress increased susceptibility to the pathogen. Air relative humidities (RH) higher than 50% were not favorable for canker development and maximum canker development occurred in plants subjected to combinations of low RH and water stress. Disease development was poorest on plants grown in soils with high water-holding capacities. Nonfertilized plants were more susceptible than plants fertilized regularly.