Dothichiza canker of poplar

Disease type
  • Latin : Cryptodiaporthe populea (Sacc.) Butin
  • English: Dothichiza canker of poplar
  • French: Chancre dothichizéen du peuplier
  • Order/Class: Diaporthales
Description

Distribution

Eastern Canada

Micro-habitat(s)

Bark, Branch, Twig

Damage, symptoms and biology

Newly planted saplings, those in nurseries, young trees under stress, and large ornamentals are all susceptible to attack. The result of canker development is the death of branches, an unattractive appearance, and possibly whole-tree mortality. Stem cankers may cause stem breakage under snow loads or high winds. Points of branch breakage and cankers present ideal locations for infection by decay and other fungi.

Comments

This fungus was known for many years as Dothichiza populea Sacc. & Briard. There is evidence that this disease is European in origin. Trees under stress are most often infected by this fungus. Control is best carried out through silvicultural methods. When establishing stands, trees should be widely spaced to reduce tree-to-tree infection, and diseased portions should be pruned from infected trees. Pruning should be carried out only during the main growing season and not at cooler times of the year. Planted stock should be maintained under good growing conditions to reduce stress and subsequent infection at outplanting.

References

Myren, D.T., Laflamme, G., Singh, P. et Lachance, D. 1994. Maladies des arbres de l’est du Canada. Ressources naturelles Canada, Service canadien des forêts, Direction des sciences et du développement durable, Ottawa, 159 pp.

Sinclair, W.A., Lyon, H.H and Johnson, W.T. 1987. Diseases of trees and shrubs. Comstock Publishing Associates, Cornell University Press, Ithaca, New York, 574 pp.

Information on host(s)

Main host(s)

Hybrid poplar, Lombardy poplar

Photos
  • Cryptodiaporthe populea (Sacc.) Butin

    Pycnidia

  • Cryptodiaporthe populea (Sacc.) Butin

    Fruiting on a Dothichiza canker caused by Cryptodiaporthe populea.

  • Cryptodiaporthe populea (Sacc.) Butin

    Damages caused by the dothichiza canker of poplar.

  • Cryptodiaporthe populea (Sacc.) Butin

    Dieback of a a Lombardy poplar (Populus nigra cv. Italica) due to infection by Cryptodiaporthe populea, the causal agent of Dothichiza canker.

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