Abstract
The bacterial swollen stem canker of poplar is prevalent in planted poplars of northeast China. Serious damage occurs in the form of necrosis, putridity, cankers, swollen stems and discolored wood of trunks and branches of young and mature trees. Tests of allergic reaction, pathogenicity, culture characteristic, Gram stain and anaerobic culture revealed that the pathogen isErwinia sp. Its occurrence depends mainly on the predisposing factors of the disease among which the susceptibility of poplars is the most important one. The disease becomes widespread in association with low-lying and high-humidity terrain, frost injury, node wounds, insect damage, and pruning and other mechanical wounds. Harmful factors promote the disease.
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Cunti, X., Haifeng, S., Guisheng, L. et al. Bacterial swollen stem canker on poplar: The disease and its causes. J. Northeast For. Univ. 2, 48–55 (1991). https://doi.org/10.1007/BF02874791
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DOI: https://doi.org/10.1007/BF02874791