black spots on juniper

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black spots on juniper

Post  eaton2008 on Sat Apr 24, 2010 1:17 pm

my juniper has got black spots on its foliage!!the juniper was repotted a couple of weeks ago!!







does anyone know if this is a bug or a fungas??what is the best treatment??


Last edited by eaton2008 on Mon Apr 26, 2010 9:46 pm; edited 1 time in total

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black spots on juniper

Post  Guest on Sat Apr 24, 2010 1:46 pm

Looks like a fungus to me but hold off with treatment until someone gives more specific diagnosis. Haven't seen this one before.

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black spots on juniper

Post  Guest on Mon Apr 26, 2010 5:55 pm

Has anyone seen this before?

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Re: black spots on juniper

Post  JimLewis on Mon Apr 26, 2010 9:42 pm

Not me.

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Re: black spots on juniper

Post  Kev Bailey on Tue Apr 27, 2010 9:24 am

Nor me, sorry. Nina, heeeelp!

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Re: black spots on juniper

Post  AlainK on Tue Apr 27, 2010 12:04 pm

I haven't either... Confused

Too small to be a type of black scales in early developement ?...

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Re: black spots on juniper

Post  JimLewis on Tue Apr 27, 2010 2:38 pm

Maybe just dirt?

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Jim Lewis - lewisjk@windstream.net - Western NC - People, when Columbus discovered this country, it was plumb full of nuts and berries. And I'm right here to tell you the berries are just about all gone. Uncle Dave Macon, old-time country musician

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Phomopsis blight?

Post  Geoline on Tue Apr 27, 2010 3:03 pm

Notice how the spots are infecting juvenile growth and the juvenile growth is not a healthy color. Perhaps this is Phomopsis blight as described in the following PDF document:

http://www.utextension.utk.edu/publications/spfiles/SP277-B.pdf

I have seen this kind of spotting occur in places like home improvement garden centers in an enclosed greenhouse where there are overhead water misters and the environment becomes way too humid for junipers. For example, the greenhouse is set up to grow primarily tropicals year round but they bring in popular conifers for their spring sale. Guess what happens to those conifers who are not native to a wet tropical environment?

I'm kind of allergic to conifers in general so I'm not the best person to give advice on Phomopsis blight.

Good luck and hugs to Nina!
Geoline

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Re: black spots on juniper

Post  stavros on Tue Dec 28, 2010 7:41 pm

Hi, i cannot offer any advice on the problem, on the contrary i am having a similar problem and i would like to ask if there is any remedy for it.
I haven't seen any bugs, scale, or black spots, and the trees tend to grow,but some new needle turn brown.

Help!


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Black spots on juniper

Post  Dan r56 on Fri May 06, 2011 8:03 am

Hi, I have had these spots on my juniper for a year or more. I think it is a fungus and have tried fungus fighter but with no results, if you use a tooth brush gently they do come off.

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Re: black spots on juniper

Post  PkWk on Fri May 06, 2011 2:34 pm

I have that too on my juniper before but not knowing what exactly what it was.
I got rid of them by using a not so strong air jet blown them off from the leaves.

Good luck.

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Re: black spots on juniper

Post  Billy M. Rhodes on Fri May 06, 2011 3:59 pm

Stavros

If you are keeping your plants indoors that is the problem along with over watering and/or staying too wet.

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Re: black spots on juniper

Post  Orion on Fri May 06, 2011 4:00 pm

The closest I have seen to the black spot were dead aphids. I don't know if aphids take after junipers, I've never had them on mine, but I've had them on crabapples. After I treated them with neem, the aphids will turn black after they die off.

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Re: black spots on juniper

Post  stavros on Fri May 06, 2011 4:42 pm

Billy M. Rhodes wrote:Stavros

If you are keeping your plants indoors that is the problem along with over watering and/or staying too wet.

I have never kept any plant indoors. I use 80% (at least) inorganic substrate 3-6mm and it is almost impossible to overwater unless you sit the pot in a tray with water.
One of the things that can happen though is that due to constant high temperatures 38-45C (100-115F) and high humidity during late July-August the trees and plants shut down their systems (they go dormant) and they cannot absorb all the water from the pot. The potted substrate becomes overwatered even if is watered properly and it is also prone to fungal attack. In this case, the tips may "burn" and go brown, the tree may be underwatered because it cannot absorb water effectively and signs of overwatering may appear. This is my humble diagnosis......sorry but i have to find a cause and end up to a diagnosis with everything (my "professional" part of the brain takes over lol! )

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Re: black spots on juniper

Post  Guest on Tue May 17, 2011 2:41 am

If I didn't know better (and I'm not sure even of that) those look like the little poo's left behind by thrips. But what would thrips want with a juniper?

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Black Spots on Juniper

Post  bonsaisr on Tue May 17, 2011 3:11 am

It looks more like an insect than a fungus. Have you examined it under a magnifying glass? In England, of all places, there must be extension agents or some sort of horticultural resource. Contact Kew; they can probably refer you to somebody.
Hi, Geoline. Haven't heard from you in ages.
Iris

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Re: black spots on juniper

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