Molecular Plant Pathology (2019) 20, 8-19

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Janneke Aylward, Francois Roets, Leánne L. Dreyer and Michael J. Wingfield (2019)
Teratosphaeria stem canker of Eucalyptus: two pathogens, one devastating disease
Molecular Plant Pathology 20 (1), 8-19
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.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website

Database assignments for author(s): Janneke Aylward, Francois Roets, Michael J. Wingfield

Research topic(s) for pests/diseases/weeds:
review

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Teratosphaeria zuluensis	Eucalypt (Eucalyptus)
	Teratosphaeria gauchensis	Eucalypt (Eucalyptus)