cedar quince rust

Gallignostics chatfield.1 Mon, 07/17/2017 - 10:21

  Let us call this A Case of Gallignostics. Plant galls are defined as abnormal plant growths caused by a gall-maker; the gall-maker being certain insects, mites, fungi, and bacteria. From horned oak gall to bacterial crown gall, from maple bladder galls to cedar-apple rust galls, there are many galls of interest to horticulturists. Relative to all this, Joe Boggs recently got an e-mail from Michael Goldman of the Grange Insurance Audubon Center:

 

  I'm a big fan of the BYGL, and found something here that might be interesting for it.  The pictures I took look like some...

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Jim Chatfield
Joe Boggs
Rosaceous Rusts Rampage chatfield.1 Mon, 06/19/2017 - 14:00

Rust on serviceberry? Yes. Has the whole world gone mad? No. It just reveals itself to each of us in manageable gulps.  We talk frequently of three “cedar rusts” on BYGL: cedar apple rust, cedar hawthorn rust, cedar quince rust, all caused by separate species in the fungal genus Gymnosporangium (bygl.osu.edu/node/781).  In fact, it is not as simple as this – there are over 40 species of the Gymnosporangium fungus. 

 

  Not only that, but there are over 480 species in 11 genera of the rose family (Rosaceae) that are affected by Gymnosporangium ...

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Jim Chatfield

Cedar Quince Rust Rages

  Christmas In July: Some hawthorns these past two weeks are sporting little orange sherbet-colored aecial spore masses of the cedar quince rust fungus (Gymnosporangium clavipes), pushing out from the haws. I am receiving many calls about this and, Frits Rizor, the Executive Director of the Ohio Nursery and Landscape Association, even sent me a text and image the other day – we are all plant pathologists!

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Jim Chatfield