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Stem Necrosis of Greenhouse Tomato Caused by a Novel Pseudomonas sp.. B. N. Dhanvantari, Agriculture Canada, Research Station, Harrow, Ontario N0R 1G0. . Plant Dis. 74:124-127. Accepted for publication 2 August 1989. Copyright 1990 The American Phytopathological Society. DOI: 10.1094/PD-74-0124.

A fluorescent Pseudomonas sp. causes a sporadic stem necrosis in greenhouse tomato (Lycopersicon esculentum). The pathogen, like P. cichorii, is oxidase-positive and arginine dihydrolase-negative but, unlike P. cichorii, is not pathogenic to chrysanthemum or lettuce, utilizes sucrose and d(?) tartrate but not l(+) tartrate, reduces nitrate, grows at 6 C, and produces strain-specific blue, green, or orange water-soluble pigments on King’s media A and B.