Author Topic: Spruce needle disease?  (Read 2237 times)

base797

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Spruce needle disease?
« on: June 17, 2013, 08:10 PM »
I have noticed 3 englemann spruce I have seem to have an issue. Purpleish/brown patches on this years needles. Also, one plant has dropped last years needles. I've heard of a fungus, rhizosphaera, that can effect Colorado Spruce when they are young (I think). I've never heard of this for englemann and they are quite old. Any thoughts would be greatly appreciated. Oh, I have many other spruce that are not showing any signs of this.
 

AdamJ

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Re: Spruce needle disease?
« Reply #1 on: June 18, 2013, 08:46 PM »
I'll have to check my engleman and report back.  Not seen that before.
 

AdamJ

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Re: Spruce needle disease?
« Reply #2 on: June 19, 2013, 03:38 PM »
I have this on 1.  Never seen it before.
 

AdamJ

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Re: Spruce needle disease?
« Reply #3 on: June 19, 2013, 03:40 PM »
Here is the whole tree.  Seems to be doing fine except for the pink spots.
 

october

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Re: Spruce needle disease?
« Reply #4 on: June 19, 2013, 05:49 PM »
Looks like needle cast like on pines.. same patterns and everything except a slightly different color. You will need to spray this tree with a fungicide. Liquid copper fungicide is good. I use the Bonide brand. You mix it yourself with a gallon of water. I do not know how a spruce will react to it.  I know that it does not affect the color of pines, so I assume it won't affect the color of spruce. Cover the soil so the spray does not go into it. Also, you will need to spray immediately. Fungal diseases can wipe out trees in a few weeks and this one already has a good hold.

Rob
 

base797

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Re: Spruce needle disease?
« Reply #5 on: June 19, 2013, 06:49 PM »
Rob,
Thanks for the info. Is it usually a one time application or is it something that requires multiple spraying over a time period? It seems like I recall reading that certain fungus need to be treated over the course of up to two years. Again, thank you for your time.

Patrik
 

october

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Re: Spruce needle disease?
« Reply #6 on: June 19, 2013, 07:08 PM »
Providing that it is some sort of needle cast, You might have to spray 2-3 times. About 2 weeks apart. Fungus' are some of the worst things. They move very fast. Fungus will literally kill sections of a tree in a few days. Sometimes, you need to alternate different fungicides. However, I think that a few sprayings might take care of it. 

Also, if you normally shower off the entire tree when you water, cut back on that. The fungus thrives on that.

If the copper is working, you will probably know within a week. The tree will look better and start growing more. If you find that after a few weeks or so, things are looking worse. Try Daconil concentrate. The one you mix yourself. Not the premade stuff in the spray bottle.

Rob