Tag Archives: June

Disease Hotline Issue 10

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Discula anthracnose on dogwood leaves.

 

 

 

 

Close-up of discula anthracnose on dogwood leaf.

 

 

 

 

 

Discula anthranose on dogwood flower petals.  This and the previous images of dogwood anthracnose (discula anthracnose) were provided by:  Robert L. Anderson, USDA Forest Service, Bugwood.org

 

 

 

 

 

Image of discula anthracnose on stem of flowering dogwood.  Photo provided by:  Mary Ann Hansen, Virginia Polytechnic Institute and State University, Bugwood.org

Photos of red thread have already been posted to the site.  Please use the search function to locate images.

Insect Hotline Issue 10

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Hibiscus sawfly adult.

 

 

 

 

 

 

 

Hibiscus sawfly adult showing the yellowish to brownish tan patch often found on the thorax.

 

 

 

 

 

 

 

Hibiscus sawfly larvae.

 

 

 

 

 

 

 

Extensive Hibiscus sawfly feeding damage.  All photos were found at the following website:  http://www.uark.edu/ua/arthmuse/hibsaw.html.  The images appear to have been taken by J.K. Barnes

Disease Hotline Issue 12

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Horsechestnut leaf blotch. Photo taken by: M. Petitjean, University of Massachusetts Extension & found at: http://www.umassgreeninfo.org/fact_sheets/diseases/guignardia_leaf_blotch.pdf

Cercospora leafspot on rose. Photo provided by: Paul Bachi, University of Kentucky Research & Education Center, Bugwood.org

Cedar apple rust. Photo provided by: USDA Forest Service – Region 8 Archive, USDA Forest Service, Bugwood.org

Cedar apple rust. Photo provided by: Daniel H. Brown, USDA Forest Service, Bugwood.org