Nomenclature, Pathogenicity, and Conidial Germination of Phyllostictina pyriformis. J. Y. Uchida, Research Associate, Department of Plant Pathology, University of Hawaii, Honolulu 96822. M. Aragaki, Plant Pathologist, Department of Plant Pathology, University of Hawaii, Honolulu 96822. Plant Dis. 64:786-788. Copyright 1980 American Phytopathological Society. DOI: 10.1094/PD-64-786.

Chlorotic and necrotic leaf spots of Dendrobium spp. were found to be caused by Phyllostictina pyriformis. Incubation periods were 6–12 wk for chlorotic and 6–8 mo for necrotic spots. Conidial germination of P. pyriformis on water agar was less than 1%, compared with approximately 90% on water agarose prepared with SeaKem Agarose.