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Confirmation of ray blight disease of pyrethrum in Australia


Pethybridge, SJ and Wilson, CR, Confirmation of ray blight disease of pyrethrum in Australia, Australasian Plant Pathology, 27, (1) pp. 45-48. ISSN 0815-3191 (1998) [Refereed Article]

DOI: doi:10.1071/AP98004


Isolations from affected plant parts of pyrethrum exhibiting flower bud abortion and necrotic symptoms consistently yielded a Phoma sp., identified as the anamorph of Didymella ligulicola, the causal agent of ray blight of chrysanthemum. Pathogenicity of both mycelial and conidial inoculum of the isolated fungus to pyrethrum was proven. Infection of stem pieces occurred by direct penetration of the fungal hyphae with invasion being both inter- and intracellular. Infection was associated with red pigmentation and cytoplasmic crystalline inclusions of host tissues. This is the first confirmed record of this disease of pyrethrum in Australia.

Item Details

Item Type:Refereed Article
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Crop and pasture production
Research Field:Crop and pasture protection (incl. pests, diseases and weeds)
Objective Division:Plant Production and Plant Primary Products
Objective Group:Horticultural crops
Objective Field:Horticultural crops not elsewhere classified
UTAS Author:Pethybridge, SJ (Dr Sarah Pethybridge)
UTAS Author:Wilson, CR (Professor Calum Wilson)
ID Code:14863
Year Published:1998
Web of Science® Times Cited:32
Deposited By:Tasmanian Institute of Agriculture
Deposited On:1998-08-01
Last Modified:2011-08-09

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