What’s New

New Fact Sheet - Marssonina Blotch of Apple

Disease Alert:  Beech Leaf Disease - A Disease Killing American Beech Trees

Beach leaf disease was first discovered in Ohio in 2012. It has since been found in Pennsylvania, New York, and Ontario, Canada in North America.  In Connecticut, this disease was first detected in August 2019.  The disease has been observed mainly in forests, but also in landscaped areas.  For more information of this disease, please read a new fact sheet Beech Leaf Disease. 

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A fact sheet: "Oak Wilt - An Invasive Pathogen on Connecticut's Doorstep! " written by Dr. Robert Marra.

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A fact sheet "Delphinella Shoot Blight of Fir" was published online. 

Fir trees infected by Delphinella shoot blight in a Christmas tree farm

July 2019

Disease Alert: Downy Mildew

Downy mildew of impatiens                                                Basil downy mildew

Destructive downy mildew diseases were confirmed on impatiens and basil plants in residential gardens this summer. For detailed information of these diseases, please see our fact sheets Downy Mildew of Impatiens and Basil Downy Mildew.