Interaction of Alternaria macrospora and Fusarium lateritium on Spurred Anoda. D. K. Crawley, Graduate Research Assistant, Center for Alluvial Plains Studies, Delta State University, Cleveland, MS 38733. H. L. Walker, Research Plant Pathologist, and J. A. Riley, Technician, Agricultural Research Service, Southern Weed Science Laboratory, Stoneville, MS 38776. Plant Dis. 69:977-979. Accepted for publication 15 April 1985. This article is in the public domain and not copyrightable. It may be freely reprinted with customary crediting of the source. The American Phytopathological Society, 1985. DOI: 10.1094/PD-69-977.

The interaction of diseases incited by Alternaria macrospora and Fusarium lateritium on spurred anoda (Anoda cristata) plants was influenced by levels of inocula, ratios of inocula, and the sequence of inoculation for each pathogen. The highest levels of plant mortality were obtained when A. macrospora was applied 5 days before F. lateritium, and the lowest levels of plant mortality were obtained when F. lateritium was applied 5 days before A. macrospora. This interaction is potentially useful to increase the effectiveness of the two pathogens as mycoherbicides.