Incidence and Severity of Bacterial Speck of Tomato in Southwestern Ontario in 1979. W. G. Bonn, Research Scientist, Research Station, Agriculture Canada, Harrow, Ontario N0R 1G0. Plant Dis. 64:586-587. Copyright 1980 American Phytopathological Society. DOI: 10.1094/PD-64-586.

Bacterial speck of tomato has become a serious problem in tomatoes grown in southwestern Ontario in recent years. It was not a problem in local greenhouse-produced transplants in 1979. Surveys indicated that in 1979 field incidence of this disease was higher and more severe on plants that were raised in the greenhouse than on those grown in the southern United States and transplanted.