Ashe Juniper problem

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Ashe Juniper problem

Post  ironman on Fri Feb 09, 2018 3:04 pm

I have a problem with my Ashe Juniper I need some help with.
The leaves are turning brownish. There are other leaves unaffected.




The first picture shows the discolored area on the lower right side of the tree.
The second shows a close up of the discoloring and the third shows natural coloring.
I've had the collected tree 20 years and is potted up using Akadama, lava and pumice equally.

ironman
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Ashe Juniper problem

Post  ironman on Mon Feb 12, 2018 2:46 pm

The juniper has done well for many years but over the past couple months the color changed a bit...I fertilize once a week with organics from March to October and water 3-times a day (I live in HOT South TEXAS). I've change to watering just twice a day. I suspect a fungus as I've fought diplodia on a couple others for 6 months...
Do you have any thoughts about a possible cause or remedy?

ironman
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Ashe Juniper problem

Post  ironman on Wed Feb 14, 2018 2:46 pm

Yesterday I changed to watering schedule to once per day

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Re: Ashe Juniper problem

Post  augustine on Thu Feb 15, 2018 2:41 pm

My first thought is fungus, treat with the appropriate fungicide.

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Ashe Juniper problem

Post  ironman on Thu Feb 15, 2018 3:04 pm

Augustine: that brings up actually two questions; is it really a fungus? and if it is, what is the appropriate fungicide?

I've had issues with Diplodia on a couple other juniper and have been fighting it for many months. The fungus appears as rust colored tips which causes them to die off and then branch dies and if left untreated, your juniper turns toes up dead! I've been trimming off the rust colored tips and spraying one week with one fungicide the the next with the other one. I also treat my bench with with the same procedure in case the Diplodia is is present on the bench.

The issue I posted appears not to be the same but I treat this juniper with the same treatment. Nothing seems to change...
Here's what I've been using;

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Re: Ashe Juniper problem

Post  BrendanR on Thu Feb 15, 2018 5:24 pm

Listening to a radio chat show today I learned that there are about 2 - 3 million types of fungus, that plant fungus types are often unknown and untreatable.

It does look like a fungus to me. I'd remove all the dead or dying parts and burn them. I'd quarantine this tree. I'd treat it with every type of fungicide I have. I'd do everything I can to keep it safe - temperature, humidity etc monitored as much as possible.

If it pulls through, good. But that one seems to be in the red zone to me? pale

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Ashe Juniper problem

Post  ironman on Fri Feb 16, 2018 4:04 pm

BrendanR: Thanks you for your input
OUCH! 'Red zone' sounds terminable. I will wait to take all of the discolored material off the tree for a few weeks until we have a weather change. If it spreads, I may rethink and gather my cutters...

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Ashe Juniper problem

Post  ironman on Mon Feb 19, 2018 4:49 pm

Update...

I contacted Colin Lewis about the problem and here's his suggestion;

Many junipers become purple when cold dormant, but that's not going to happen where you live.  My hope would be some vascular damage that affects the lower branches on that one side is responsible, and a redesign would solve the problem. But I see there are smaller outbreaks within otherwise healthy branches, which does indicate fungal issues.

First, I would cut out all dead and dying branches - right out, leaving tiny jins at best, and sterilizing the blades after each cut (Zerotol or alcohol and fire!). The two go-to fungicides that I use are Daconil and Mancozeb. I also use a product called Zerotol which is anti-bacterial as well as a fungicide. This should also be watered into the soil to combat pseudomonas.  It's only available in commercial quantities - like 2.5 gallons, so it's not cheap but well worth it.  

I thought about it for a day then took my trusty cutters and removed the first small branch. I noticed that that small branch was not strong and was sort of spongy which indicated to me it was already dead or at least dying. I kept going and removed a larger branch, sterilizing the blades with alcohol and fire. I noticed the fungus - a dusty substance - was on my gloves. After finishing all the removal, I piled the limbs and greenery and burned them. Here's a picture of the work;



I ordered the Zerotol today as I've already tried Daconil and Mancozeb with no effect on my problem. You are right-a little pricy. I am making corn water tea - to generate the Trachyderma, an organic fungicide - suggested by a local horticulturalist for use until your expensive stuff shows up.

Fingers crossed.

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Re: Ashe Juniper problem

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