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| One of my three Cornus florida dogwoods has a few branches which did not leaf out or flower this year.
It was about its current size when I moved in a decade ago. This is not a new transplant. Last major changes near it were the removal of two ash trees to its west, one seven, the other four years back. I removed 80% of the dead wood today. Definately dead. Here are some pics.
Only one branch has this. It is actually still alive.
Am I looking at anthracnose, a canker or a combination? Oh, for a couple years the tree has leafed fine but has had some domant bud sprouts. I blamed it on increased sun exposure. The amount of dead branches on the tree is probably 5 to 10 percent and some of the remaining hust do not loom great, smaller leaves and them stressed edges. Anything I can do and can I burn the dead wood w/o spreading spores or whatever? |
Follow-Up Postings:
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- Posted by ken_adrian z5 (My Page) on Mon, Apr 23, 12 at 7:45
| second pic is lichens.. irrelevant .. the leaves look like cold damage ... and i dont know on the rest ken |
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- Posted by gardengal48 PNW zone 8 (My Page) on Tue, Apr 24, 12 at 15:03
| Pretty classic anthracnose symptoms if you ask me - bark/trunk cankers and leaf tip necrosis and spotting. Trees can linger on indefinitely with this ailment but I'd plan on removal/replacement somewhere down the road. |
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| I don't have much experience with dogwood anthracenose, but that it's in full sun, and I assume good air circulation would tend to prevent anthracenose of dogwoods. The leaf discoloration is probable due to insufficient sap making it to the leaf tips. IME, cold does not damage dogwood leaves very often. All that put together, I lean toward canker. IIRC, there are several of C. florida. IMHO, take the tree out. If you want another one, then wait at least one year before replanting. Also if you do take the tree out, get the roots out as well, so that you can examine them for possible problems as well. Arktrees |
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| I agree with Gardengal. 'Appalachian Spring' might be considered if another Cornus florida is preferred as a replacement. |
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- Posted by toronado3800 Z6 St. Louis (My Page) on Thu, Apr 26, 12 at 21:34
| Thanks for the insight. This one is not threatening the house so it can live or die naturally. To me anthracnose meanse keep the leaf debris away from it in the fall. Really it does not have the best air circulation. You would think back in the day when the ash was over it would have been typical anthracnose time. Perhaps stress from suddenly being in the sun weakened it. If I can live with a declining tree in that spot, is there another reason to remove it, like keeping any disease from spreading? |
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| Unless you have more dogwoods in the near vicinity, I wouldn't worry about spreading the disease. The disease is fairly ubiquitous in most areas where dogwoods are found. Stressed trees are more likely to be affected. Like with most plant disease, weaker trees are much more likely to be affected, and, once infected, the diseased trees are much more prone to other diseases/issues. |
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