Occurrence of Phytophthora Species on Various Hosts in North Carolina. Z. G. Abad, Department of Plant Pathology, North Carolina State University, Raleigh 27695-7616. T. Creswell, R. K. Jones, and H. D. Shew. Department of Plant Pathology, North Carolina State University, Raleigh 27695-7616. Plant Dis. 78:830. Accepted for publication 11 April 1994. Copyright 1994 The American Phytopathological Society. DOI: 10.1094/PD-78-0830C.
Previously unreported hosts for species of Phytophthora were identified in samples received at the Plant Disease and Insect Clinic at North Carolina State University. Isolates were obtained primarily from plants with root rot symptoms and identified using the keys of Waterhouse. Species of Phytophthora found on new hosts are as follows: P. cactorum (Lebert & Colin) J. Schrot. on Madagascar periwinkle (Catharanthus roseus (L.) G. Don) and boxwood (Buxus sp.); P. cinnamomi Rands on Venus' s-flytrap (Dionaea muscipula Ellis) and coralbells (Heuchera sp.); P. citricola Sawada on hemlock (Tsuga sp. Carriere); P. colocasiae Racib. on American ginseng (Panax quinquefolius L.); P. cryptogea Pelhybr. & Lafferty on spruce (Picea sp. A. Dietr.) and globe thistle (Echinops sp); P. citrophthora (R.E. Sm. & EH. Sm.) Leonian on boxwood (Buxus sp); P. dreschleri Tucker on baby's breath (Gypsophila sp.), columbine (Aquilegia sp), scarlet sage (Salvia splendens L), juniper (Juniperus sp), Norway spruce (Picea abies (L.) Karsten), white pine (Pinus strobus L), basil (Ocimium basilicum L.), littleleaf linden (Tilia cordata Mill. 'Greenspire'), and raspberry (Rubus sp); P. lateralis Tucker & Milbrath on creeping juniper (Juniperus horizontalis Moench 'Blue rug), azalea (Rhododendron sp), Fraser photinia (Photinia ? fraseri Dress), mountain laurel (Kalmia latafolia L.), and Madagascar periwinkle; P. megasperma Drechs. on southern pea (Vigna unguiculata (L.) Walp.); P. parasitica Dastur on scarlet sage; P. syringae (Kleb.) Kleb. on photinia (Photinia sp.), and shore juniper (Juniperus conferta Parl. 'Blue Pacific").