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What is causing this damage to my magnolia leaves
I do not know what is causing this
0
I do not know what is causing this
Posts
I'd have said little snails cause the initial damage and fungal attack follows. That looks like a deciduous magnolia so all will be academic in a week or so and we can start again, fresh, in about March/April.
H-C
Looks like Magnolia Blight (Pseudomonas syringae).
http://homeguides.sfgate.com/magnolia-blight-33184.html
http://www.ehow.com/info_12305107_molds-diseases-magnolia-tree.html
H-C is right that there's little to be done now. I've posted some links that may give you further advice to help you manage it in the future.