Unknown disease on ninebark

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wyldeflwr Laurel, MD(Zone 7a) Aug 16, 2015

I have a small ninebark and it has developed spots on the leaves. Can someone tell me what it is and what to do to fix it? Thanks.

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Post #10128169
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Diana_K Contra Costa County, CA(Zone 9b) Aug 17, 2015

Bacterial and fungal leaf spots can look like this. With proper ID you could figure out what to spray them with, before the spots appear.
As late as it is in the season, I would still try to ID it, and find out if a preventive spray can help- perhaps by lowering the population of overwintering spores.

Post #10129126
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ShooFly83 Hobart, Australia Aug 20, 2015

Could it be a soil based disease? A quick Google comes up with some information here ( http://www.leicesters.co.nz/soil-borne-diseases/ ). Any of those symptoms etc look familiar? Just a thought!

This message was edited Aug 20, 2015 1:15 AM

Post #10130157
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Diana_K Contra Costa County, CA(Zone 9b) Aug 21, 2015

Bacterial or fungal leaf spots may overwinter in the soil. The spores are then splashed up onto new, tender leaves with the spring rains. The disease grows in the tissues for a while, then produces spores that may spread via wind or water to new hosts.

This is not a soil borne problem such as nematodes or other pests or diseases that attack the roots.

Post #10130923
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wyldeflwr Laurel, MD(Zone 7a) Aug 24, 2015

Got this as a seedling this spring and it's in new potting soil.

This message was edited Aug 24, 2015 3:34 PM

Post #10132158
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