Bacterial wilt of Indian tree (Polyalthia longifolia Benth and Hook)
1996
Natural, M.P. (Philippines Univ. Los Banos, College, Laguna (Philippines))
Indian trees that were planted along the highway of Calauan, Laguna [Philippines] showed wilt symptoms. Microscopic examination revealed bacterial infection. Pathogenicity to tomato seedlings and hypersensitivity of tobacco plants were tested. The tomato plants wilted 5 days after stem injection. Hypersensitive reaction was observed less than 24 hours after infiltration of bacteria on tobacco leaves. Nicotiana glutinosa but not N. tabacum; Solanum melongena (eggplant) also wilted. Incubation period was more than 2 weeks. Cells were Gram negative, rod-shaped,aerobic, non-space forming. Other physiological and biochemical tests indicate that the pathogen is a strain of Pseudomonas solanacearum E.F. Smith. This is the first report of P. salanacearum, infecting a tree here in the Philippines, and the first report on Polyalthia longifolia
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