Phytophthora Crown, Stem & Root

Phytophthora Crown, Stem & Root - image 1

Causal Agent:

Phytophthora nicotianae, P. cryptogeae, P. cactorum, P. dreschleri

Susceptible Crops:

Affects all turfgrass, Agapanthus, Azalea, Boxwood, Camellia, Dianthus, Holly, Juniper, Lavender, Lily, Liriope, Lupine, Pansy, Petunia, Rhododendron, Rose, Rosemary, Salvia, Viburnum, Vinca


  • Plants begin to wilt and will not recover with additional water or cooler temperatures
  • The lower stem will have a dark, water-soaked lesions near the soil line
  • Plants ultimately collapse
Phytophthora Crown, Stem & Root - image 2