Phytophthora Root and Crown Rot of Franklinia Trees
Abstract: A root and crown rot leading to wilt of Franklinia alatamaha has become an increasingly important disease in nursery production of this plant. The pathogenicity of Phytophthora sp. isolated from diseased roots and crown cankers was shown in inoculated, rooted cuttings and 1 to 3 year-old, container-grown plants. The disease has not been observed in well-established field plantings of this tree. The fungus was identified as Phytophthora cinnamomi on the basis of morphology and mating type. Truban or Banrot drenches effectively controlled the disease in container stock.