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DNR Finds Oak Threat in Store Rhododendrons

May 30, 2019

The Indiana DNR confirmed today that it has intercepted plants containing a fungal pathogen that kills oak trees, sudden oak death (SOD), for the firsts time in about 10 years.

Inspectors from the DNR Division of Entomology & Plant Pathology detected SOD (Phytophthora ramorum) in several varieties of rhododendrons being sold in Columbus, Noblesville, South Bend, Sullivan and Tippecanoe.

SOD has killed large tracts of oaks on the West Coast.  SOD has not been established in the Midwest, to date.  SOD can kill standing oak trees, which could happen if SOD-positive rhododendrons were planted within about 6 feet of a standing oak.

For more information go to:

Indiana DNR

What is Sudden Oak Death?

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