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Ninebark Problem

15 years ago

White spots.

A little knowledge is a dangerous thing, but I think I might know what's causing it.

We have new sod. The sprinklers soak the ninebark leaves.

Is that it?

If so - or even if not - what should we do to save the plants?

Thanks

Featured Answer

shawzy

13 years ago

Can anyone tell me why both of my summerwine ninebark's appear to be dying..They are 3 years olf and always healthy. This year half of each shrub appears to have small shriveled red leaves and they other half are budding as they should. Any suggestions would be helpful.

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Comments (8)

Dibbit
15 years ago
A) Where are you located?
B) Can you post a photo?
C) Are the white spots on the leaf surfaces? Are they making the leaves rot, shrivel up or what?
D) How hard is your water? In other words, does your water have lots of minerals in it?
notes
Original Author
15 years ago
(A) Zone 5. Northeast Iowa
(B) Not real sure how, but I'll give it a try.
(C) Spots are on the leaf surfaces. A few have shriveled, but not many.
(D) Pretty sure we have hard water.
2 plants in question are CenterGlows. There are also 2 SummerWines that receive the same amount of spray from the sprinklers, but they get more direct sun. No spots on them.
Thanks
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I have two diablo ninebarks too. I love this plant. I'm really amazed that it got that infected and from the picture I would say that yes, it is downy mildew. Though, when you said that the leaves turn black and die, that made me think of blight. Diables have a tendency to get too bushy which could impede air circulation so I judiciously prune to allow better air circulation. Maybe that's why none of this has happened to my shrubs yet. You might want to cut a diseased stem and take it to your local cooperative extension where someone who is an expert can tell you what it is or test it to find out exactly so that you will know how to treat the disease properly. As far as moving this plant that would be impossible considering the size and the fact that it is pretty deep rooted. What you might want to do is layer a stem still attached to the plant to start new plants. Simply pull lower stems down to the ground, remove the leaves in the middle of the stem and cover that portion with soil (you might have to anchor it with a cloths pin or a rock) leaving the tip of the stem (with leaves) sticking out of the ground. It will root and if you have to eventually replace the shrub you will have a copy to replace it with - that is, if the plant isn't genetically inferior, which is something that I have been studying about lately. Just like all living things, sometimes there will be genetic differences between shrubs of the same species. This is more likely if you've got the shrubs from the same place. Though unlikely, it could be a possibility. Good luck.
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some seasons it a losing battle to control PM ... its not really going to kill a plant .. but you arent going to be spending a lot of time gazing at its beauty.. lol ... i am njot sure one of those white blobs wasnt wooly aphids ... https://www.google.com/search?q=downy+aphids&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiEurqb2ubNAhUMET4KHR2zAeAQ_AUICCgB&biw=902&bih=745&dpr=0.9#tbm=isch&q=wolly++aphids how old it the 9bark.. when planted ... can we see the whole ... all kinds of things attack stressed plants ... and often ... if you dont address the stress.. it really doenst amtter if you remove all the secondary issues ... e.g. if this is a recent planting.. and watering it improper ... then you better fix that first ... i can tell by your manicure.. your a new gardener.. lol ... just try to remember.. not everything has to be fixed in the garden,.. this isnt no disney movie ... we only go to those lengths.. when the plant is being significantly damaged ... and a little PM is not signif.. in my world .. and bug populations ebb and flow over the years ... ken
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gazania_gw
15 years ago
Consider powdery mildew. Google some sites for it and see if anything looks like yours. My Diablo's have had quite a bit of it this year.
jasper60103
15 years ago
I had some problems with my Diablo Ninebark this year. I took a clipping to my local nursery and they said it was mold, but I'm doubful. The leaves near the bottom of the shrub are kinda rust colored, not a powdery mold. Anyway, they sold me a bottle of 3in1. No change so far.
gardenfanatic_2008
15 years ago
I also have a serious problem with fungus on a golden ninebark. I have used fungicides but without any improvement. I just bought a Diablo for another area. Hope this is not going to happen to this as well.
notes
Original Author
15 years ago
I took a leaf in to the nursery, and they said it was powdery mildew.
My son has a couple ninebarks that have some white "globs" of stuff on them.
The person at the nursery thought it might be something called scales.
You can scrape a little of the white stuff off and see if there are bumps on the stem. If so, there's some kind of oil you can get to treat it.
rbrady
13 years ago
If it is not powdery mildew then google dogwood borer for symptoms of infestation and see if it matches your situation. Dogwood borers will attack Ninebarks. Hope this helps.

Rhonda

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