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Phytophthora nicotianae Can Cause Both Crown Rot and Foliage Blight on Phlox paniculata in South Carolina

D. T. Drechsler, S. N. Jeffers, and W. C. Bridges

November 2014


Phytophthora nicotianae is a common pathogen of many herbaceous perennial plants, and has been found causing disease on garden phlox (Phlox paniculata) in wholesale nurseries in South Carolina for a number of years. The objective of this study was to use Koch’s postulates to confirm that Phytophthora nicotianae is pathogenic to Phlox paniculata and can cause both crown rot and foliage blight.


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