Botryosphaeria spp. are recognised as important pathogens of grapevines, both in Australia and overseas. Entry of these speciesvia pruning wounds and the initiation of canker formation in the vascular tissue results in a slow decline and dieback often describedas 'dead arm'. Vascular damage to the xylem results in the loss of spur positions along the cordon, a feature accentuated by progression of the disease basipetally towards, and eventually down the trunk of the vine. Information on the role of these fungiin grapevines in Australia is currently limited, and a field survey comprising vineyards throughout the major grape-growing regions of New South Wales and South Australia was conductedin order to determine the occurrence of Botryosphaeria sp. in these regions. Botryosphaeria spp. were the most commonly isolated fungi, and morphological and molecular identification revealed the presence of at least five species on grapevines: B. obtusa,B. rhodina, B. stevensii, B. dothidea, and B. parva. Other pathogens isolated from field samples included Eutypa lata, Phomopsisviticola, Phaeomoniella sp., Phaeoacremonium sp. and the bunch rot pathogens Greeneria uvicola and Colletotrichum spp.
|Journal||Journal of Plant Pathology: rivista di patologia vegetale|
|Issue number||2, Supplement|
|Publication status||Published - 2008|