Forest Pathology (2019) 49 (6 - e12567)

Juha Kaitera, Tuomas Kauppila and Jarkko Hantula (2019)
Pathogenicity of Thekopsora areolata from seed orchards in Finland on Prunus spp. and Picea abies
Forest Pathology 49 (6 - e12567)
Abstract: Pathogenicity of cherry-spruce rust, Thekopsora areolata, was investigated by inoculations with aeciospores from seven Norway spruce, Picea abies, seed orchards that had suffered from successive severe rust epidemics in the 2000s in Finland. Detached leaves of Prunus spp. were inoculated in the laboratory using aeciospores from cones of various ages. In the greenhouse, live Prunus padus plants were inoculated, and possible autoecism of the rust was tested by inoculations of Picea abies seedlings. Thirty-five spore sources from the seed orchards formed uredinia on Prunus spp. in the laboratory 2 weeks after incubation, but no telia developed. In the greenhouse, uredinia developed on live P. padus, but no rust symptoms, cankers or sporulation were detected on Picea abies. Thus, no evidence of autoecism was observed among the T. areolata populations and therefore all populations, suggesting all those tested from the Finnish seed orchards were heteroecious.
(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): Juha Kaitera, Jarkko Hantula

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Thekopsora areolata	Spruce (Picea)	Finland
	Thekopsora areolata	Prunus (genus - other than fruit trees)	Finland