Erbaugh D, Windham M, Stodola AJW, Augé RM. 1995. Light and drought as predisposition factors for dogwood anthracnose disease. Journal of Environmental Horticulture 13:186-189. Light and drought stress were studied as predisposition factors for dogwood anthracnose. Disease progression recorded as a percentage of leaves with lesions in two-year-old potted dogwood trees (Cornus florida L.) That had been inoculated with dogwood anthracnose (Disculadestructiava Redlin sp. nov.) and subjected to four light (100%, 50%, 10% and 2% ambient light) and two drought treatments. Natural vs. artificial inoculation methods were compared and found to have similar effects on disease severity. Shade increased disease severity; maximum disease progression values for trees in thoroughly watered treatments were about 5% at 100% light and 50% light, 35% at 10 % light, and 26% at 2%light. Drought increased disease severity on all shaded trees, where disease progression increased 625% in 50% light, 43% in 10% light and 31% in 2% light, compared to 100% light. Drought had no effect on disease severity of unshaded trees.