The Eucalyptus shoot and leaf pathogen Teratosphaeria destructans recorded in South Africa.

Species ofTeratosphaeriainclude some of the most important fungal pathogens of plantation-grown eucalypt trees. During routine disease surveys, symptoms and signs of leaf spot and blight were observed on the foliage of one-year-oldE. grandis×E. urophyllahybrids in the Zululand region of KwaZulu-Natal, South Africa. These were distinct from those caused by the well-known and leaf-infecting fungusTeratosphaeria suttonii, which is not considered an important pathogen in the country. Culture and morphological characteristics as well as DNA sequences for three gene regions were used to compare the fungus isolated from the newly emerging symptoms with those for knownTeratosphaeriaspecies. DNA sequences were the same as those forT. destructansand this was consistent with the distinctive morphology of the asexual spores and the symptoms on leaves.Teratosphaeria destructansis an aggressive pathogen and actions will be needed to ensure that it does not impart serious losses to the local forestry industry. [ABSTRACT FROM AUTHOR]