1. CHYTRIDIALES

PLASMODIOPHORACEAE

Plasmodiophora brassicae Woron.

Pole Evans (1913) 93 ; van der Byl (1922 d) 282 ; Verwoerd (1929 b) 9, (1931 a) 298 ; Doidge & Bottomley (1931) 15, 32, 59, 64 ; Nel (1942) 9 ; Anon. (1935) 82 ; Karling (1942) 93, 127.

on Brassica oleracea Linn., Stellenbosch, v. d. Byl, 18094, and Verwoerd ; Bellville, Bowman, 28258 ; Kruispad and Brackenfel, Brink ; Bottelary and Kuilsrivier, v. d. Byl ; Wellington, v. d. Byl 2431, and Verwoerd, (Stell. 311) ; Maitland, Paarl and Cape Flats, Verwoerd ; Bloemfontein, Verwoerd ; Alberton, Mendes, 33918.

Brassica oleracea var. acephala DC., Wellington, v. d. Byl.

Brassica oleracea var. botrytis Linn., Brackenfel, v. d. Byl, 18064.

Stellenbosch, Dieprivier, Wellington and Kuilsrivier, Verwoerd.

Brassica oleracea var. gemmifera Zenk., Wynberg, Verwoerd.

Brassica rapa Linn., intercepted in the United States on material from South Africa.

Iberis sp., Durban, Wager, 34160.

Sorodiscus radicicolus Ivimey Cook

Ivimey Cook (1931) 321 ; Karling (1942) 48.

on Gynandropsis pentaphylla DC., Greylingspos, Doidge, 27351 Type, and

F. Turner, 23206; The Hangingshaw, Rustenburg, F. Turner, 23381 ; Koster, Shorten, 23217.

Spongospora subterranea (Wallr.) Lagerh.

Doidge & Bottomley (1931) 52 ; Hopkins (1938 a) 98, (1939 a) 43 ; Nel (1942) 9 ; Karling (1942) 57, 135.

on Solanum tuberosum Linn., tubers and stems, Tweespruit, Nelson, 18024 ; Cato Ridge, Allsop, 24956 ; Hamberg, F. Turner, 27356 ; Eloff, Caplan & Blieden, 28722 ; Salisbury (Rh. 1828, 3239) ; Chipinga (Rh. 3011) ; Somabula (Rh. 3221) ; without locality, v. d. Byl 463.

WORONINACEAE

Olpidiopsis ricciae du Pless.

du Plessis (1933 a) 761 ; Nel (1942) 8.

on Riccia sp., Stellenbosch, Duthie 5006, 5007, (Stell. 603, v. d. Byl 2691) Knysna, Duthie 5118.

SYNCHYTRIACEAE

Synchytrium cotulae du Pless.

du Plessis (1933 e).

on Cotula coronopifolia Linn., Stellenbosch, Duthie, (Stell. 862).

Synchytrium dolichi (Cooke) Gaümann

van der Byl (1928 a) 183 ; Nel (1942) 10.

Aecidium dolichi Cooke, (1882 a) 127.

Aecidium rhynchosiae Cooke, (1882 a) 127.

Woroninella dolichi (Cooke) Syd., van der Byl (1925 b) 191 ; Hopkins (1938 a) 98, (1939 a) 48.

96

on Dolichos biflorus Linn., Inanda, Medley Wood 640, 340, 840, 10290.

Dolichos sp., Inanda, Medley Wood 40, 10291.

Desmodium scalpe (Comm.) DC., Inanda, Medley Wood 613, 10301, 11200. Glycine javanica Linn., Durban, v. d. Byl 76.

Rhynchosia spp., Maritzburg, Pole Evans, 1432 ; Barberton, Pole Evans, 1161 ; Natal, Medley Wood 557, 11114, Kew.

Vigna luteola (Jacq.) Benth., Goukama R., Duthie (v. d. Byl 1703).

Vigna triloba (Thunb.) Walp., Shamva (Rh. 2595).

Synchytrium endobioticum (Schilb.) Perc.

Doidge (1926) 161 ; Doidge & Bottomley (1931) 53.

on Solanum tuberosum Linn., Castle Howard, Woodrow, 15439 ; Witpoortje and Hamberg, Doidge ; Pretoria (artificial infection) 15511 ; isolated outbreaks of this disease in 1922 and 1925 were dealt with by quarantine measures ; last occurrence in 1926.

CLADOCHYTRIACEAE

Physoderma maydis Miyabe

Physoderma zeae-maydis Shaw, Hopkins (1938 a) 98, (1939 a) 50.

on Zea mays Linn., Salisbury, (Rh. 1295, 1310).