sycamore anthracnose

Sycamore Anthracnose Redux

American planetrees or sycamores are known for their near defoliation from sycamore anthracnose disease in spring as the leaves emerge. Yet. Yet typically the trees recover and look normal by July. And so it went in the season of 2020 in Ohio.
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Authors
Jim Chatfield

Sycamore and Ash Anthracnose

Symptoms of two host-specific fungal anthracnose diseases are becoming apparent in southwest Ohio.  Ash anthracnose was announced by the appearance of irregularly shaped reddish-brown, blotchy spots along the edges of the leaflets.  The leaf necrosis often causes the leaflets to curl and severe infections may lead to defoliation.
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Authors
Joe Boggs

Sycamore Anthracnose Symptoms Fade

  This morning I got a message from Frank Leon, horticulturist with Barnes Nursery, complete with the above image showing the thinning of sycamore (American planetree; Platanus occidentalis), a common sight seen in northwest Ohio this Spring. The problem is sycamore anthracnose, caused by the fungus Apiognomonia veneta.

 

 

  This particular anthracnose fungus occurs on planetrees, including our native sycamore, but less so on Platanus orientalis and the hybrid between these two planetrees, Londone planetree (PlatanusX acerifolia...

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Authors
Jim Chatfield

Sycamore Anthracnose

Enquiring eyes throughout Ohio are noticing sparse foliation on sycamores (American planetree) and to a lesser extent London planetree hybrids this Spring. Not to worry, the culprit is almost assuredly sycamore anthracnose disease.  This fungal disease occurs every year, but is enhanced when there are cool, wet conditions during leaf emergence, conditions which were common throughout Ohio this year. If history is to be any guide, these planetrees will recover well, putting out new leaves which will make us forget how they look now by late June.

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Published on
Authors
Jim Chatfield
Joe Boggs