Calonectria Leaf Spot of Howeia forsterana in Hawaii. J. Y. Uchida, Department of Plant Pathology, University of Hawaii, Honolulu 96822. M. Aragaki, Department of Plant Pathology, University of Hawaii, Honolulu 96822. Plant Dis. 76:853-856. Accepted for publication 5 March 1992. Copyright 1992 The American Phytopathological Society. DOI: 10.1094/PD-76-0853.

Grayish brown, nearly black, or reddish brown and zonate leaf spots on Forster sentry palm (Howeia forsterana) were shown to be caused by three species of Calonectria, namely, C. theae, C. colhounii, and C. crotalariae. Each of these fungi has a Cylindrocladium anamorph. Teleomorphic and anamorphic characteristics of isolates of all three species from Howeia are given, including macroconidial characteristics of C. theae.

Keyword(s): Metrosideros collinus.