When: 2011-11-04

Collection location: Devil’s Lake State Park, Sauk Co., Wisconsin, USA [Click for map]

Who: Andrew Khitsun (Andrew)

No specimen available


Proposed Names

Please login to propose your own names and vote on existing names.

= Observer’s choice
= Current consensus


Add Comment
I doubt it’s Phragmidium violaceum
By: Andrew Khitsun (Andrew)
2013-04-21 16:34:30 PDT (-0700)

That species seems to appear in Pacific Northwest on a few species of invasive blackberry only, and it’s claimed not to infect any native plants. The species in question here is all over the place here in Wisconsin on native dewberry. Is there more information on Phragmidium violaceum being widespread around here?
Here is a link to a document from Pacific Northwest on Phragmidium violaceum:

Searching for a name
By: Darvin DeShazer (darv)
2012-03-18 20:32:55 PDT (-0700)

A similar looking leaf – on blackberry

By: Darvin DeShazer (darv)
2012-03-18 20:22:19 PDT (-0700)

Septoria leaf spot and anthracnose leaf disease also look similar.

No pictures
By: Andrew Khitsun (Andrew)
2012-03-18 20:10:26 PDT (-0700)

I haven’t found any photos of Pucciniastrum arcticum online. Should we tentatively name this species based on your experience?

By: Darvin DeShazer (darv)
2012-03-18 19:59:01 PDT (-0700)

Dewberry and brambles are the alternate host for the rust Pucciniasrtum arcticum. The aecia form on the main host, Picea glauca (white spruce). But the uredinia stage infects dewberry and causes yellow-brown leaf spot.

Similar to #84853
By: Andrew Khitsun (Andrew)
2012-01-02 07:28:51 PST (-0800)

It looks somewhat similar to an observation 84853, although there is a different species of raspberry involved. Again, I don’t know for sure if it’s fungal.