TABLE 1. Isolates of Phytophthora spp. used in this investigation.

Species Group^a Isolate #^b Host Origin

Phytophthora boehmeriae II 325^PT, P1257^MC Boehmeriae nivia Papua New Guinea

Phytophthora cactorum I SB2079^GB Fragaria x ananassa California

Phytophthora capsici II Cp-25^DJM (A-2) Citrullus lantatus Florida

Phytophthora cinnamomi VI Cn-2^DJM (A-2 mating type) Vaccinium spp. Florida

Phytophthora citricola III SB2078^GB Fragaria x ananassa California

Phytophthora citrophthora II Ct -1^DJM Theobroma cacao Brazil

Phytophthora clandestine I IMI287317^DC Trifolium subterranean Australia

Phytophthora colocasiae IV 346^PT, P3773^MC Colocasia esculenta Indonesia

Phytophthora cryptogea VI IMI 045168 Lycopersicon esculentum New Zealand

Phytophthora drechsleri VI ATCC 46724 (Type) Beta vulgaris U.S.A.

Phytophthora erythroseptica VI 367^PT Solanum tuberosum New York

Phytophthora fragariae fragariae V 395^PT, ATCC 13974 Fragaria x ananassa New York

Phytophthora gonapodyides VI 393^PT, NY353^WW Malus sylvestris New York

P245^DC, IMI389725 Salix mastsudana U.K.

P501^DC, IMI389729 Ilex roots U.K.

Phytophthora heveae II Hv-2^DJM Theobroma cacao Brazil

Phytophthora hibernalis IV 337^PT, ATCC 32995, P0647^MC Citrus sinensus California

Phytophthora humicola V IMI302303^DC soil from citrus Taiwan

Phytophthora idaei I IDA3^DC (Type) Rubus idaeus Scotland

Phytophthora ilicis IV 343^PT, P6100^MC, 802^PH Ilex aquifolium Oregon

Phytophthora inflata III IMI342898^DC Syringa sp.

Phytophthora infestans IV 127^PT, ATCC 48723 Solanum tuberosum New York

Phytophthora iranica I IMI158964^DC Solanum melongera Iran

Phytophthora katsurae II IMI360596^DC Cocos nucifera Ivory Coast

Phytophthora lateralis V IMI 040503 (Type) Chamaecyparis U.S.A.

Phytophthora medii II IMI129185^DC Hevea brasiliensis India

Phytophthora megasperma V IMI133317 Malus sylvestris Australia

Phytophthora megakarya II 328^PT, P184^CB Theobroma cacao Cameroon

Phytophthora melonis VI IMI325917^DC Cucumis sp. China

Phytophthora mirabilis IV 340^PT, ATCC 64070, P3007^MC Mirabilis jalapa Mexico

Phytophthora nemorosa IV P-13^EH, 482^PT Type Lithocarpus densiflorus California

2052.1^EH, 483^PT Lithocarpus densiflorus Oregon

Phytophthora nicotianae II 331^PT Nicotiana tabacum North Carolina

Phytophthora palmivora II Pl-5^DJM, P626^UCR Theobroma cacao Brazil

Phytophthora phaseoli V 352^PT, ATCC 60171, CBS 556.88 Phaseolus lunatus unknown 373^PT, Phaseolus lunatus Delaware

403^PT Phaseolus lunatus Delaware

406^PT (Race D) Phaseolus lunatus Maryland

Phytophthora porri III CBS782.97^DC Brassica chinensis The Netherlands

Phytophthora primulae III CBS620.97^DC Primula acaulis Germany

Phytophthora pseudosyringae IV PSEU16^TJ, 484^PT, NFV-BU97-15 Fagus sylvatica Germany

P96^EH, 485^PT Umbellularia californica Contra Costa Co., CA

470^PT, P193907A^CDFA Manzanita sp. Royal Oaks, CA

471^PT, 1168699^CDFA Umbellularia californica Napa, CA

472^PT, 1168676^CDFA Umbellularia californica Calistoga, CA

473^PT, P110361^CDFA Umbellularia californica Yountville, CA

Phytophthora pseudotsugae I 308^PT, H270^PH Pseudotsugae menziesii Oregon

Phytophthora quercina V IMI340618^DC Quercus robur Germany

Phytophthora ramorum IV Prn-1, PD93/844^sw Rhododendron sp. Netherlands

Prn-2, PD94/844^sw Rhododendron sp. Netherlands

Prn-3, PD98/8/6743^sw Rhododendron sp. Netherlands

Prn-4, PD98/8/6285^sw Rhododendron sp. Netherlands

Prn-5, PD98/8/2627^sw Rhododendron sp. Netherlands

Prn-6, PD98/8/5233^sw Viburnum sp. Netherlands

Prg-1, BBA 69082^sw Rhododendron sp. Germany

Prg-2, BBA 9/95^sw, CBS101553 (Type) Rhododendron catawbiense Germany

Prg-3, BBA 14/98-a^sw Rhododendron catawbiense Germany

Prg-4, BBA 12/98^sw Rhododendron catawbiense Germany

Prg-5, BBA 13/99-1^sw Rhododendron catawbiense Germany

Prg-6, BBA 16/99^sw Viburnum bodnantense Germany

Prg-7, BBA 9/3^sw water Germany

Prg-8. BBA 104^sw water Germany

288^MG Rhododendron sp. California

73101^CDFA Lithocarpus densiflorus California

044519^CDFA Umbellularia californica California

044522^CDFA Lithocarpus densiflorus California

P072648 ^CDFA Quercus agrifolia California

201C^DR Rhododendron sp. California

0217^DR Rhododendron sp. California

Coen^MG Rhododendron sp. California

013^DR Lithocarpus densiflorus California

016^DR Quercus agrifolia California

Phytophthora richardiae VI ATCC46538^DC Zantedeschia sp. root The Netherlands

Phytophthora sojae V 312^PT, ATCC 48068 Glycine max Wisconsin

Phytophthora syringae III IMI 296829 Rubus idaeus Scotland

Phytophthora tentaculata I CBS552.96^DC Chrysanthemum leucanth. Germany

Phytophthora sp. “O” group^c P246^DC, IMI389751 Salix roots U.K.

P. taxon Pgchlamydo^c P510^DC, IMI389731 Pseudotsugae roots Canada

P. taxon Raspberry^c P896^DC, IMI389744 soil Tasmania

^a Waterhouse morphological group (Waterhouse 1963)

^b CB = Clive Brasier, DC= DNA supplied by David Cooke, MC=Michael Coffey,GB= Greg Brown, KD = Ken Deahl, PH = Phil Hamm (E. Hansen), DJM=Dave Mitchell, DS=Dave Shaw, PT=Paul Tooley, UCR = University of California at Riverside, SW= Sabine Werres, WW=Wayne Wilcox, DR= Dave Rizzo, CDFA=Cheryl Blomquist, California Dept. of Food and Agriculture.

^c Species groupings of Brasier et al. (5)