A serious canker disease of Eucalyptus in South Africa caused by a new species of Coniothyrium
- 84 Downloads
Eucalyptus spp. are being propagated extensively as exotics in plantations in South Africa, and many other parts of the world. In South Africa, a number of diseases result in serious losses to this resource. This paper describes a new and very damaging stem canker disease, which has recently appeared on plantation-grown eucalyptus in South Africa. The disease, first noted in an isolated location in Zululand is now common in other parts of the country, and is typified by discrete necrotic lesions on stems. These lesions coalesce to form large, gum-impregnated cankers and malformed stems. The causal agent of the disease, as inferred from pathogenicity tests, is a new species of Coniothyrium described here as C. zuluense. This fungus is a serious impediment to eucalypt propagation in South Africa, and is most likely a threat to similar forest industries elsewhere in the world.
Key wordsEucalyptus stem canker Coniothyrium zuluense tree disease South Africa
Unable to display preview. Download preview PDF.
- 1.Wingfield MJ. Current status and future prospects of forest pathology in South Africa. S Afr J Sci 1990; 86: 60–62.Google Scholar
- 3.Wingfield MJ, Swart WJ, Kemp GHJ. Pathology considerations in clonal propagation of Eucalyptus with special reference to the South African situation. Proceedings of the IUFRO International Symposium. Intensive Forestry: The Role of Eucalypts. Durban, September 1991, pp. 811–820.Google Scholar
- 4.Wingfield MJ, Swart WJ, Abear BJ. First record of Cryphonectria canker of Eucalyptus in South Africa. Phytophylactica 1989; 21: 311–313.Google Scholar
- 6.Sutton BC. Eucalyptus microfungi. Satchmopsis gen. nov., and new species of Coniella, Coniothyrium and Harknessia. Nova Hedwigia 1975; 26: 1–16.Google Scholar
- 7.Sutton BC. The Coelomycetes. Commonwealth Mycological Institute, Kew, UK, 1980, 696 pp.Google Scholar
- 9.Ferreira FA. Ferrugem do eucalipto — ocorrência, temperatura para germinaçào de uredosporos, produçào de teliosporos, hospdeiro alternatioe e resistência. Fitopatol Bras 1981; 6: 603–604.Google Scholar
- 10.Ferreira FA. Ferrugem do eucalipto. Rev Arvore 1983; 7: 91–109.Google Scholar
- 11.Ciesla WM, Diekman M, Putter CAJ. (eds.). FAO/IPGRI technical guidelines for the safe movement of germplasm. No. 17. Eucalyptus spp. Food and Agriculture Organisation of the United Nations, Rome. International Plant Genetic Resources Institute, Rome, Italy, 1996.Google Scholar