Canker of Dogwood Caused by Lasiodiplodia theobromae, a Disease Influenced by Drought Stress or Cultivar Selection. J. M. Mullen, Extension Plant Pathologist/Diagnostician, Department of Plant Pathology, Alabama Cooperative Extension Service; C. H. Gilliam, Professor, Department of Horticulture, Alabama Agricultural Experiment Station; A. K. Hagan, Extension Specialist and Associate Professor, Department of Plant Pathology, Alabama Cooperative Extension Service; and G. Morgan-Jones, Professor, Department of Plant Pathology, Auburn University, Auburn, AL 36849. Plant Dis. 75:886-889. Accepted for publication 25 March 1991. Copyright 1991 The American Phytopathological Society. DOI: 10.1094/PD-75-0886.
 

Lasiodiplodia theobromae caused cankers in both nondrought-stressed and preinoculation drought-stressed, wounded, container-grown seedling dogwoods (Cornus florida) (1.2–1.5 m tall). Drought-stressed inoculated trees developed larger cankers than nondrought-stressed inoculated trees. Nonstressed, inoculated Cherokee Chief (red flowered) dogwoods developed larger cankers than Welsh’s Jr. Miss (pink flowered) and Barton White (white flowered) dogwoods. No cankers developed on any uninoculated dogwoods regardless of drought stress.