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[IBC] Black spots on my cork bark elm leaves. Please help
My cork barels as been getting black spots on the leaves. I have not
observed any bugs on the tree. The early summer was quite wet, raining almost every day which is a elco,ed relieve from the drought we experienced last year hear in Colorado. Does this should like black spot disease, anthracnose ? If so what can I do to help my tree. I have cut of the leaves with the black spots and have destroyed them, Any suggestions will help. Is my tree in immediate danger? Thanks in advance. Manny ************************************************** ****************************** ++++Sponsored, in part, by Mike Page ++++ ************************************************** ****************************** -- The IBC HOME PAGE & FAQ: http://www.internetbonsaiclub.org/ -- +++++ Questions? Help? e-mail +++++ |
#2
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[IBC] Black spots on my cork bark elm leaves. Please help
My cork barels as been getting black spots on the leaves. I have not
observed any bugs on the tree. The early summer was quite wet, raining almost every day which is a elco,ed relieve from the drought we experienced last year hear in Colorado. Does this should like black spot disease, anthracnose ? If so what can I do to help my tree. I have cut of the leaves with the black spots and have destroyed them, Any suggestions will help. Is my tree in immediate danger? Thanks in advance. Manny I'm not being especially brilliant by suggesting your tree has "black spot of elm" caused by the fungus Stegophora ulmea. It's not a serious disease (it won't kill the tree), so don't worry too much. There are two ways to control it: one is to remove the diseased leaves carefully, making sure not to touch healthy leaves while you're doing it, and washing your hands afterward. Afterwards you have to keep the foliage dry (put the tree in a location where rain won't hit it and water the soil only). That's the calm, no-pesticide method, which I would use myself for a mild case. If your case is more serious, the other way would be to use a fungicide. Maneb or Mancozeb or a combination of mancozeb and copper hydroxide are the recommended treatments in NY; you'll have to check the labels to see if they are legal in Colorado. Again, I would recommend keeping the foliage dry between spray treatments until the disease is under control (it is spread by rain-splash). Good Luck! -- Nina Shishkoff Frederick, MD ************************************************** ****************************** ++++Sponsored, in part, by Mike Page ++++ ************************************************** ****************************** -- The IBC HOME PAGE & FAQ: http://www.internetbonsaiclub.org/ -- +++++ Questions? Help? e-mail +++++ |
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