Tobacco Blackfire Disease in Wisconsin. Robert W. Fulton, Department of Plant Pathology, University of Wisconsin, Madison 53706. Plant Dis. 64:100. Accepted for publication 21 March 1979. Copyright 1980 American Phytopathological Society. DOI: 10.1094/PD-64-100.

In August 1978, tobacco blackfire disease caused by Pseudomonas angulata was found in a number of fields of Havana 503 tobacco in Wisconsin. Isolates from four fields caused infection in tobacco with TL 106 resistance to P. tabaci, supporting the conclusion that P. angulata arises as a mutant of P. tabaci.