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[IBC] Wilting Maple Leaves
Anyone know what would cause initially healthy new growth on a maple to
suddenly start to wilt? I don't think I overwatered. The soil is well-draining. It's actually happened to 2 out of 4 maples I have. Could it be fungal? Thanks, Jim ************************************************** ****************************** ++++Sponsored, in part, by Evergreen Gardenworks++++ ************************************************** ****************************** -- The IBC HOME PAGE & FAQ: http://www.internetbonsaiclub.org/ -- +++++ Questions? Help? e-mail +++++ |
[IBC] Wilting Maple Leaves
In a message dated 4/16/2003 12:05:02 PM Eastern Standard Time, writes:
Anyone know what would cause initially healthy new growth on a maple to suddenly start to wilt? I don't think I overwatered. The soil is well-draining. It's actually happened to 2 out of 4 maples I have. Could it be fungal? If the tree has been exposed to cold evenings, this condition is understandable; otherwise and unfortunately, it could be root zone damage from the winter. Cordially, Michael Persiano members.aol.com/iasnob/index.html ************************************************** ****************************** ++++Sponsored, in part, by Evergreen Gardenworks++++ ************************************************** ****************************** -- The IBC HOME PAGE & FAQ: http://www.internetbonsaiclub.org/ -- +++++ Questions? Help? e-mail +++++ |
[IBC] Wilting Maple Leaves
In a message dated 4/16/2003 12:05:02 PM Eastern Standard Time,
writes: Anyone know what would cause initially healthy new growth on a maple to suddenly start to wilt? I don't think I overwatered. The soil is well-draining. It's actually happened to 2 out of 4 maples I have. Could it be fungal? And Michael said: If the tree has been exposed to cold evenings, this condition is understandable; otherwise and unfortunately, it could be root zone damage from the winter. I add: It could also be a couple of funguses. Can you describe what is happening in a bit more detail? Is the wilt general? Just very new growth at tips of branches? Branch-by-branch? Doe the leaves turn brown? Black? Crispy? Which maples? Trident? Japanese? Swamp? Other? Jim Lewis - - Tallahassee, FL - Our life is frittered away by detail . . . . Simplify! Simplify. -- Henry David Thoreau - Walden ************************************************** ****************************** ++++Sponsored, in part, by Evergreen Gardenworks++++ ************************************************** ****************************** -- The IBC HOME PAGE & FAQ: http://www.internetbonsaiclub.org/ -- +++++ Questions? Help? e-mail +++++ |
[IBC] Wilting Maple Leaves
At 01:05 PM 4/16/03 -0400, Jim S wrote:
Anyone know what would cause initially healthy new growth on a maple to suddenly start to wilt? I don't think I overwatered. The soil is well-draining. It's actually happened to 2 out of 4 maples I have. Could it be fungal? Jim If you have Japanese maples, Acer palmatum, it is very likely they have a root fungal disease, one of the dreaded water molds. A. palmatum is very susceptible to these diseases and they are worst are this time of the year, striking just after the new growth appears. Dig around the root crown a bit and look for blackened roots and bark (sometimes in patches or stripes), a sure sign. There is little you can do other than to keep them on the dry side with good light, no nitrogen. Repotting will sometimes work if they are in dense soil, but that doesn't sound like the case here. The water molds are a group of root fungal pathogens with similar symptoms. They are systemic diseases that attack the vascular system so water cannot proceed up the stem. That is why the leaves wilt. The initial reaction is to give them more water and this of course exacerbates the problem. It is very often fatal, but sometimes only part of the tree will be affected and it will fight off the attack. Since the diesease is systemic, all the over the counter fungicides are nearly useless. I can't remember them all, but I believe the water molds include Pythium, Phytophora, and Fusarium. Another nasty that behaves like this is Verticillium, but I can't remember if it is referred to as a water mold. It would be nice for Nina to help us here. Brent in Northern California Evergreen Gardenworks USDA Zone 8 Sunset Zone 14 http://www.EvergreenGardenworks.com ************************************************** ****************************** ++++Sponsored, in part, by Evergreen Gardenworks++++ ************************************************** ****************************** -- The IBC HOME PAGE & FAQ: http://www.internetbonsaiclub.org/ -- +++++ Questions? Help? e-mail +++++ |
[IBC] Wilting Maple Leaves
Im not maple expert but i have allot of them :). I
have had a few encounters with root fungus on japanese maples. "not trident" I use a product called phyton 27 a little bit expensive but it has saved each one. Mountain Maples also swares by the product and they have thousands of maples. I cured one of my maples a coral maple which had verticillium wilt quite bad with it just last year. I also root pruned off all the leaves mid summer right before applying and trimmed off any infected branches. I did a foliar spray and a root soak http://www.phyton27.com Its a copper based root fungicide i beleive. Good Luck Ben __________________________________________________ Do you Yahoo!? The New Yahoo! Search - Faster. Easier. Bingo http://search.yahoo.com ************************************************** ****************************** ++++Sponsored, in part, by Evergreen Gardenworks++++ ************************************************** ****************************** -- The IBC HOME PAGE & FAQ: http://www.internetbonsaiclub.org/ -- +++++ Questions? Help? e-mail +++++ |
[IBC] Wilting Maple Leaves
Thanks for the feedback.
These are not Japanese maples, but I'm not sure beyond that. They were kept in an unheated garage in Pennsylvania, and may have been subject to very cold temps this winter. All the leaves on the 1 are badly wilted. The other 1 only some of the leaves. They are not crispy, just like a wet noodle. I'll check the roots and see if I can see signs of a fungus. Jim ************************************************** ****************************** ++++Sponsored, in part, by Evergreen Gardenworks++++ ************************************************** ****************************** -- The IBC HOME PAGE & FAQ: http://www.internetbonsaiclub.org/ -- +++++ Questions? Help? e-mail +++++ |
[IBC] Wilting Maple Leaves
Brent said:
If you have Japanese maples, Acer palmatum, it is very likely they have a root fungal disease, one of the dreaded water molds. A. palmatum is very susceptible to these diseases and they are worst are this time of the year, striking just after the new growth appears. The water molds are a group of root fungal pathogens with similar symptoms. They are systemic diseases No, actually, water molds aren't systemic. But because they kill roots, they doom the rest of the plant. Since the diesease is systemic, all the over the counter fungicides are nearly useless. Over-the-counter fungicides may work *preventively*, but once the tree has root rot, it's on its own to fight it off. I can't remember them all, but I believe the water molds include Pythium, Phytophora, and Fusarium. Pythium and Phytophthora are water molds, Fusarium is a true fungus that causes damping-off or systemic infection. Mycologists have always known that water molds weren't really fungi, but now it's official: they're algae. The NYTs now refers to them as "fungus-like" organisms. Another nasty that behaves like this is Verticillium, but I can't remember if it is referred to as a water mold. This is another true fungus that causes systemic infections, and is a scourge of maples. Anyway, I agree with all the advice Brent gave on treatment: don't overwater, repot if the soil is dense, watch and wait. -- Nina Shishkoff Frederick, MD ************************************************** ****************************** ++++Sponsored, in part, by Evergreen Gardenworks++++ ************************************************** ****************************** -- The IBC HOME PAGE & FAQ: http://www.internetbonsaiclub.org/ -- +++++ Questions? Help? e-mail +++++ |
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