Thursday, 16 June 2011

Parasite on Rock Rose?-

We noticed this orange stuff on some of the Rock Roses at Killinallan and were worried it was a parasite. It was difficult to tell whether the flowers affected were worse off than the unaffected ones - no noticeable signs (to the non-expert!) Any ideas?
Becky


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3 comments:

  1. Anonymous16 June 2011 at 07:53

    You'll find a copy of the "Naturalists' Handbook - Plant galls" by Redfern & Askew in the library in the Centre. Try that.
    Malcolm

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  2. Anonymous18 June 2011 at 16:57

    It looks like Scots Burnet Rose rust, Phragmidium rosae-pimpinellifoliae,which forms these orange gall-like things. See http://www.bladmineerders.nl/gallen/gallenlijst.htm for a nice picture - scroll down the index till you get to Rosa and click on the name of the Phragmidium. Robert Mill, Edinburgh (see you in July Becky)

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  3. Anonymous22 June 2011 at 19:18

    Thanks Robert. Yes, looking forward to it. Maybe join us on a ramble? Becky

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