Ask a Question forum: Aster Yellows on Coneflowers

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Name: Karen
Minnesota (Zone 4a)
Region: Minnesota Garden Art Garden Ideas: Level 2 Celebrating Gardening: 2015
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Cookies4kids
Aug 4, 2014 10:48 AM CST
I am not a newcomer to gardening, but am a newcomer at learning how to care for my plants. I have a gardening friend who knows so much that it boggles my mind. She is always talking about aster yellows on her coneflowers and she quit growing them because it always affects them. From her description, I know a bit about what it should look like and I am sure one of my plants had it a couple of years ago. Being of Irish descent and stubborn besides, I decided I wasn't going to pull out that pretty plant and just left it alone.
The next year there was no sign of any problem. In my garden down by the barn, there is a new thing that happened this year. All the cone flower foliage is really healthy and there are tons of flowers, but a few flowers here and there have no petals on the prickly centers.
What do all of you do when you suspect this aster yellows??? My main focus is Daylilies and I am wondering if they can be affected by this problem also.
Thanks for all your expert advice.
Happiness is doing for those who cannot do for themselves.
Name: Jennifer
48036 MI (Zone 6b)
Cottage Gardener Houseplants Spiders! Heucheras Frogs and Toads Dahlias
Hummingbirder Sedums Winter Sowing Peonies Region: Michigan Garden Ideas: Level 2
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jvdubb
Aug 4, 2014 10:57 AM CST
Welcome!

There is a coneflower discussion thread in perennials forum
The thread "Coneflowers" in Perennials forum

There was some discussion of Aster yellows there. Long and short is that people often confuse Aster yellows with a mite infestation. There are some similar symptoms. I do not know for sure I do not believe Aster Yellows infect Daylilies.

Perhaps someone with more knowledge will chime in here.

Again, welcome to ATP!
Name: Lin
Florida (Zone 9b)
Region: United States of America Morning Glories Region: Florida Houseplants Charter ATP Member I was one of the first 300 contributors to the plant database!
Garden Procrastinator Birds Butterflies Bee Lover Hummingbirder Container Gardener
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plantladylin
Aug 4, 2014 11:31 AM CST
I googled for Daylily Diseases and found this: http://www.daylilies.org/ahs_dictionary/diseases.html

And, all the way near the bottom of this page to "What Diseases Affect Daylilies": http://www.daylilies.org/AHSfaq2.html
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Name: Karen
Cincinnati, Oh (Zone 6a)
Forum moderator I was one of the first 300 contributors to the plant database! Cut Flowers Winter Sowing Charter ATP Member Seed Starter
Echinacea Plant and/or Seed Trader Region: Ohio Region: United States of America Butterflies Hummingbirder
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kqcrna
Aug 4, 2014 7:51 PM CST
Aster yellows can affect any plant in the asteraceae family. It is spread by leafhoppers. I had it in my yard one hot summer and lost quite a few coneflowers. The flowers turn weird looking and the foliage will start to yellow and the plant looks sick.

I also have some mites every year, and they can cause all kinds of weird distortions on the flowers. They're not deadly though. I generally just cut off obviously infected blossoms when I notice them, and trash them. But overall the plant doesn't look as sickly as with aster yellows.

Karen

Name: Bob
Vernon N.J. (Zone 6a)
Charter ATP Member Plant Database Moderator I was one of the first 300 contributors to the plant database! Forum moderator Heucheras Echinacea
Hellebores The WITWIT Badge Dog Lover Lover of wildlife (Black bear badge) Region: New Jersey Celebrating Gardening: 2015
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NJBob
Aug 4, 2014 8:43 PM CST
Welcome! Karen
Your description sounds much more like mite damage then Aster Yellows. As Karen pointed out you need to look at the leaves and overall health of the plant not just the flowers.
Name: Karen
Minnesota (Zone 4a)
Region: Minnesota Garden Art Garden Ideas: Level 2 Celebrating Gardening: 2015
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Cookies4kids
Aug 4, 2014 8:49 PM CST
Oh that info sounds more promising, so for now I am going with mites, lol. Thanks for taking the time to answer my question!! Hurray!
Happiness is doing for those who cannot do for themselves.
Name: Karen
Cincinnati, Oh (Zone 6a)
Forum moderator I was one of the first 300 contributors to the plant database! Cut Flowers Winter Sowing Charter ATP Member Seed Starter
Echinacea Plant and/or Seed Trader Region: Ohio Region: United States of America Butterflies Hummingbirder
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kqcrna
Aug 5, 2014 5:58 AM CST
Karen, google images might be helpful. Here's a good page, too:

http://www.clemson.edu/extension/hgic/plants/landscape/flowe...

other Karen

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