UK Fungi

Melampsoridium sp.?

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  • August 22, 2015 at 9:37 am #29649
    marksteer

      On Downy Birch Betula pubescens. Looks like photos in Dutch Rust Fungi. 2 species mentioned on this host M.betulina and M.hiratsukanum but mentions that thought by some to be same species. Specimen drying for Nigel!

      August 22, 2015 at 6:24 pm #35868
      Chris Yeates

        Hi

        the extreme likelihood is that this will be Melampsoridium betulinum, an extremely common species especially on saplings; decent-sized stands of young birches are hardly ever without it.

        M. hiratsukanum is primarily a species on Alnus spp., the odd cases of its ‘jumping’ to Betula is where the host species are growing in close proximity. If on Betula , as I understand it, it can only be distinguished by molecular analysis.

        There is a useful summary of the situation here: https://secure.fera.defra.gov.uk/phiw/riskRegister/downloadExternalPra.cfm?id=3884” class=”bbcode_url”>https://secure.fera.defra.gov.uk/phiw/riskRegister/downloadExternalPra.cfm?id=3884

        cheers

        Chris

        August 22, 2015 at 6:50 pm #35869
        marksteer

          Chris Yeates wrote:

          Hi

          the extreme likelihood is that this will be Melampsoridium betulinum, an extremely common species especially on saplings; decent-sized stands of young birches are hardly ever without it.

          M. hiratsukanum is primarily a species on Alnus spp., the odd cases of its ‘jumping’ to Betula is where the host species are growing in close proximity. If on Betula , as I understand it, it can only be distinguished by molecular analysis.

          There is a useful summary of the situation here: https://secure.fera.defra.gov.uk/phiw/riskRegister/downloadExternalPra.cfm?id=3884” class=”bbcode_url”>https://secure.fera.defra.gov.uk/phiw/riskRegister/downloadExternalPra.cfm?id=3884

          cheers

          Chris

          Hi Chris many thanks for link. Around this location there are Alder but I haven’t checked for Rusts on them. Specimen drying and I will send to Nigel Stringer in due course. I’m still very much a beginner with Rusts! Mark

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