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Post by Deleted on Jun 17, 2008 14:36:32 GMT
Visited MIL yesterday, and when we looked around the garden one of her Acers was cover in spots. Its in a pot, as is another one which is just fine. Is it a feed issue or does anyone have an ideas what it is, please?? The spots are not raised and I couldnt find any creepy crawlies.  Top of leaf.  Under side of leaf |
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Post by bagpuss on Jun 17, 2008 15:57:18 GMT
Hi mm
Does this help?
"Phyllosticta Leaf Spot of Maple. Pathogen: Phyllosticta minima
Like many fungal leaf spots, this disease affects a number of maple species, most prominently Amur, Japanese, red and silver maple. The disease causes little damage because the infection is localized. Spots are roughly circular and develop into tannish spots with purple to red borders. Later in the season the spots often contain black fruiting bodies of the fungus arranged in rings inside the lesion. Although this disease is quite noticeable in the landscape, especially on silver and red maples, and causes concern among homeowners, damage is minimal and fungicides are rarely necessary. If fungicides are required use a labeled product containing mancozeb or chlorothalonil.
Some common product names containing the fungicides mentioned in this fact sheet include: mancozeb (Fore, Dithane, Mancozeb); chlorothalonil (Daconil*, Bravo, Ortho multipurpose fungicide*); Thiophonate-methyl (Cleary's 3335, Domain) and triadimefon (Bayleton, Strike). It is the user's responsibility to be certain that the fungicide being used is labeled for the specific plant being treated."
Found it by googling spots on maple leaves
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