Chinese Elm green leaves with black spot

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Chinese Elm green leaves with black spot

Post  deckermw on Tue Sep 21, 2010 12:22 am

I have a ten year old Chinese Elm I inherited. Some leaves (mostly on same branch) have a small black spot on them. Is this the process of shedding leaves or the start of the black spot fungus. Thanks so much in advance for your help, it's greatly appreciated!

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Chinese Elm green leaves with black spot

Post  Guest on Tue Sep 21, 2010 2:55 am

Sonds like black spot to me. All Elms can be troubled with this fungus and is easily treated with a diluted Lime Sulphur spray. 1 part LS to 30 parts water should do the trick. Remove and trash any infected or fallen leaves.

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Chinese elm black spot?

Post  deckermw on Tue Sep 21, 2010 11:29 pm

Is the lime sulfur (powder)available at nurseries? I have heard of Neem oil for this also. Is this a treatment also? Thanks for any advice

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Re: Chinese Elm green leaves with black spot

Post  JimLewis on Wed Sep 22, 2010 12:07 am

Lime sulfur is sold as a liquid. You dilute it at something like 40:1 as a spray for the disease. I haven't seen it in smaller than a pint bottle -- which is a lifetime supply for a bonsaiest.

When you remove the leaves, remove them completely from the area; the garbage pail is good. And stop watering in a way that gets water on the leaves.

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Jim Lewis - lewisjk@windstream.net - Western NC - People, when Columbus discovered this country, it was plumb full of nuts and berries. And I'm right here to tell you the berries are just about all gone. Uncle Dave Macon, old-time country musician

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Re: Chinese Elm green leaves with black spot

Post  Guest on Wed Sep 22, 2010 1:40 am

Is there an echo in here. Very Happy
You may find some bonsai nurseries split a big bottle up but its not that expensive anyway. Some people make their own but I would advocate cooking it outside if you value your life. Its quite smelly.

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Re: Chinese Elm green leaves with black spot

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