Two years ago, all the leaves along a major branch shrivelled up and died in September. In the following spring, no buds appeared and the entire branch was dead, so I cut it off.
The tree was fine all summer. There was plenty of rain and water. Now, again, I'm seeing the same thing. Leaves turning brown at the tips, then the whole leaf turns brown and shrivels up. It's not the entire tree, though. Only certain branches - in groups about the size of a football.
What is the problem?
2007-09-27 15:46:08 · 7 answers · asked by Alice Lockwood 4 in Home & Garden ➔ Garden & Landscape
It sounds like verticillium wilt. This is a soil borne disease that commonly attacks maple trees. Characteristic of this disease is that one branch, side or section of the tree is affected. The University of Minnesota says: "Symptoms caused by Verticillium develop anytime during the growing season, but are most apt to appear in July and August. In some cases the symptoms may be more severe during or following cool weather.
In maple, the Verticillium fungus progresses around a growth ring by a combination of upward spread and tangential growth. If the pathogen fails to cross from one season's wood to the next, the result is remission of acute symptoms and compartmentalization (containment) of the diseased wood. The severity of chronic symptoms depends upon the extent of root and old wood damage. Acute symptoms that recur after one year or more of remission indicate a new infection moving up from the roots. Trees showing general and severe wilt cannot be saved and should be replaced with a nonsusceptible species.
Managing trees infected with Verticillium wilt will take time and knowledge. First, confirm that the symptoms are indeed caused by Verticillium wilt. The presence of typical symptoms and streaking of the vascular tissue is fairly diagnostic, but a laboratory culture test should be run to confirm the diagnosis.
Fungicides will not cure infected trees. Soil fumigants, if available, may be used for small amounts of garden or greenhouse soil before replanting, but are generally not feasible in landscapes.
Landscape trees with recent wilt symptoms should not be removed immediately. They may "recover" and perform fairly well with some environmental manipulation. In general, the most resistant plants are those grown in moderately fertile soil in which the balance of major nutrients is tipped slightly toward high potassium and low nitrogen. Generously watered plants are often invaded less extensively than those under moderate to severe water stress.
When replacing trees in areas where Verticillium is present in the soil, select resistant or immune trees. Fertilize properly to promote vigorous growth and water regularly during the growing season. Remove dead and weak branches. This does not remove the fungus from the tree, but prevents infection by other fungi. DO NOT use the chipped wood as a mulch unless it is properly heated in a compost pile." Disinfect your pruning equipment between cuts with 10% bleach solution.
Additional Details: It's fairly easy to determine if Verticillium wilt is the likely cause. Prune a few infected branches and use a knife to cut away the bark. You should see olive green vascular streaking down the branch. Cross sectional views will reveal a dark ring inside the bark. Branches which are not affected by this disease will show no streaking or rings. Insect damage, including borers, is generally more random than the effects of verticillium wilt.
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2007-09-27 16:10:43 · answer #1 · answered by A Well Lit Garden 7 · 1⤊ 4⤋
Verticillium Wilt Japanese Maple
2016-12-26 21:08:42 · answer #2 · answered by ? 4 · 0⤊ 0⤋
This Site Might Help You.
RE:
My Japanese Maple tree is dying?
Two years ago, all the leaves along a major branch shrivelled up and died in September. In the following spring, no buds appeared and the entire branch was dead, so I cut it off.
The tree was fine all summer. There was plenty of rain and water. Now, again, I'm seeing the same thing. ...
2015-08-07 17:00:14 · answer #3 · answered by Kimberely 1 · 0⤊ 0⤋
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I have a 6 year old and a 35 year old japanese maple. Both get dried branches occasionally. Their roots like to grow close to the surface of the soil. Do not suffocate them by putting a lot of mulch around the base. Japanese tree branches hang low to the ground. That is their natural look.
2016-04-08 03:16:43 · answer #4 · answered by ? 4 · 0⤊ 0⤋
Japanese Maple Disease
2016-10-01 23:19:23 · answer #5 · answered by ? 3 · 0⤊ 0⤋
Well, it would help to know what your climate is. Sounds like a Bore. Its a worm, and it usually only takes one to kills a tree. Find the hole. It should be easy to find because there should be sap coming from it. If you can, take a wire coat hanger in it and gently swirl it around to kill it. Also, for just a couple bucks go to the plant nursery and buy any product that has premethene in it... follow the instructions. This should do the trick. It sounds like he has already played havoc on your poor tree. Basically, they kill the tree in sections due to the fact that they have eat through a "vein" that feeds that area of the tree. All you can do now is try to save whats left of your tree if you can. Every spring from now on, buy this chemical and treat your tree from the waist down to stop anymore from attacking your trees. Check your other trees too. Good Luck.
2007-09-27 16:34:30 · answer #6 · answered by Anonymous · 1⤊ 1⤋
Yes, I agree with several of you..cutandpaste disease. It could also be a borer...lol . Noone needs lengthy cut and paste that covers the botanical world. Best advice I heard was to take a large speciman to the local county extension. Ask the experts. Your cause could be so many things that it is best to see an expert and local nurseries, sadly, are not often the answer. The nursery folks out here my way don't know JS.
2007-09-29 14:21:31 · answer #7 · answered by juncogirl3 6 · 0⤊ 2⤋
Easy 'reyn-' poor 'Well Lit-' doesn't take criticisms of his cut and pasting very well, but since he no longer accepts email, addressing him publicly is the only way for the community to make itself heard. As to the maple dying, I would take a branch to your local County Agent for the answer. RScott
2007-09-28 05:03:56 · answer #8 · answered by Anonymous · 0⤊ 2⤋
Copy and paste without first quoting the source is plagiarism deluxe. tsk tsk. Turn on the Lightinthegarden, get a clue and live up to your supposed high standards.
Have you checked your maple for insects? Do you see any abnormalities on the branches or trunk, fungal growths, splits, oozing? There could be several causes for the symptoms you refer to.`
2007-09-27 16:21:34 · answer #9 · answered by reynwater 7 · 4⤊ 2⤋