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Return to the Azalea & Rhododendron Forum | Post a Follow-Up

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azalea die back due to grey powdery spots on branches

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Posted by earl_gardener NC (My Page) on
Fri, Apr 10, 09 at 15:44

I have several mature azalea plants (~10 years old). Branches started dying from a year ago. Grey powdery spots appear along the branches first before leaves eventually wilted and the entire branch died. I suspected it's powdery mildew disease and I've tried spraying with fungiside, though not often enough I'm afraid. Anybody knows for sure what this is?

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RE: azalea die back due to grey powdery spots on branches

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  • Posted by jean001 z8aPortland, OR (My Page) on
    Sat, Apr 11, 09 at 23:03

It would help if you can post an image. Is that possible?

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RE: azalea die back due to grey powdery spots on branches

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See if you can access this picture:

http://picasaweb.google.com/lh/photo/ahoScMsqNUVSHn9GVQv5yw?feat=directlink

Thanks for replying.

Here is a link that might be useful: sick azalea picture

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RE: azalea die back due to grey powdery spots on branches

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  • Posted by jean001 z8aPortland, OR (My Page) on
    Sun, Apr 19, 09 at 1:41

Not absolutely certain, but it rather looks like lichen. If so, it's *not* killing your azalea.

If you have a large independent garden center, take a sample branch, secured in a clear container, to ask what's going on.

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RE: azalea die back due to grey powdery spots on branches

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I agree, it looks like lichens which are harmless.

Branches on azaleas die from drought or borer damage.

Here is a link that might be useful: How to grow rhododendrons and azaleas.

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RE: azalea die back due to grey powdery spots on branches

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I agree, it is lichen. Harmless.

If you've been spraying for powdery mildew it is possible you've caused some damage unless you were using a fungicide labeled for azaleas and following the instructions to the letter.

 
 

 

 


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