Update: I think it might be Asters yellow after all.

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Iris2222 Carmi, IL(Zone 6b) Jul 17, 2014

I was looking at my coneflowers today & they look different. Im afraid they might have Asters Yellow after all. :( Here are some pics. Is this Asters Yellow?

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nutsaboutnature Algonquin, IL(Zone 5a) Jul 18, 2014

It's kind of hard to tell based on the pictures since it may be in the early stages. Someone that has actually experienced it might know better, but after looking online for some decent pics that show a good representation of it, I finally found some that show it well.

Maybe this link will be useful to you.

http://www.itsnotworkitsgardening.com/2011/07/coneflower-aster-yellows-update.html

A DG member from Indiana (who frequents the Upper Midwestern Gardening forum) has been having some luck with home remedies started last year on Aster Yellows. Juhur7 is very knowledgeable about gardening, butterflies and more!
You might want to post your pics in this link and ask juhur7 whether this worked and what final formula was used.

http://davesgarden.com/community/forums/t/1329197/

Here is one other link where juhur7 talked more about the experiments:

http://davesgarden.com/community/forums/p.php?pid=9649616

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Iris2222 Carmi, IL(Zone 6b) Jul 19, 2014

Thanks nutsaboutnature. Not sure that is what it is but there is something definitely going on with them.

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