Teratosphaeria stem canker of Eucalyptus : two pathogens, one devastating disease
Date
2018
Journal Title
Journal ISSN
Volume Title
Publisher
British Society for Plant Pathology
Abstract
Background:
Teratosphaeria gauchensis and T. zuluensis are closely related fungi that cause Teratosphaeria (previously Coniothyrium) stem canker disease on Eucalyptus species propagated in plantations for commercial purposes. This disease is present in many countries in which Eucalyptus trees are planted, and continues to spread with the international trade of infected plant germplasm.
Taxonomy:
Fungi, Ascomycota, Pezizomycotina, Dothideomycetes, Dothideomycetidae, Capnodiales, Teratosphaeriaceae, Teratosphaeria.
Identification:
The causal agents form dark masses of pycnidia that are visible on the surface of distinct stem cankers that typically form on young green stem tissues. Accurate diagnosis of the causal agents requires DNA sequence data.
Host range:
Nine species of Eucalyptus are known to be affected. Of these, E. grandis and its hybrids, which include some of the most important planting stock globally, appear to be particularly vulnerable.
Disease symptoms:
Small necrotic lesions develop on young green stem tissue. These lesions coalesce to form large cankers that exude gum. Epicormic shoots develop below the girdling canker and, in severe cases, trees die.
Description
CITATION: Aylward, J., et al. 2019. Teratosphaeria stem canker of Eucalyptus : two pathogens, one devastating disease.
Molecular Plant Pathology, 20(1):8-19, doi:10.1111/mpp.12758.
The original publication is available at https://bsppjournals.onlinelibrary.wiley.com
The original publication is available at https://bsppjournals.onlinelibrary.wiley.com
Keywords
Coniothyrium -- Diseases and pests, Eucalyptus -- Classification, Eucalyptus -- Canker (Plant disease), Canker (Plant disease) -- Effect of temperature on, Teratosphaeria -- Diseases and pests
Citation
Aylward, J., et al. 2019. Teratosphaeria stem canker of Eucalyptus : two pathogens, one devastating disease.
Molecular Plant Pathology, 20(1):8-19, doi:10.1111/mpp.12758