Stagonosporopsis tanaceti
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Author(s): N. Vaghefi et al.
Source: Studies in Mycology (201) 94, p. 94
Stagonosporopsis tanaceti N. Vaghefi, S.J. Pethybridge, P.W. Crous & P.W.J. Taylor, 2012
This fungus causes ray blight of pyrethrum (chrysanthemums) in Australia. It was first reported in 1995 and caused large-scale epidemics in 1999, typically reducing yields by 50% or more. The symptoms include necrosis of the leaf margins, shoots and developing buds. In addition, the flower stems can develop shepherd crook symptoms. The fungus reproduces asexually in Australia.
Until 2012 the fungus from Australia has been identified as Phoma ligulicola var. inoxydabilis. It is closely related to 2 other species which may also infect chrysanthemums in other countries: Stagonosporopsis chrysanthemi and Stagonosporopsis inoxydabilis. Due to the close relationship with Stagonosporopsis species outside Australia, S. tanaceti might not be native in Australia.
For a review see Bhuiyan et al. (2019).
