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Pathogenicity of Thekopsora areolata from seed orchards in Finland on Prunus spp. and Picea abies
Author(s) -
Kaitera Juha,
Kauppila Tuomas,
Hantula Jarkko
Publication year - 2019
Publication title -
forest pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.535
H-Index - 49
eISSN - 1439-0329
pISSN - 1437-4781
DOI - 10.1111/efp.12567
Subject(s) - biology , rust (programming language) , inoculation , botany , picea abies , horticulture , spore , prunus , computer science , programming language
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.