1938] SERVICE AND REGULATORY ANNOUNCEMENTS 1Q5 
Marssonia e. g. M.populi (Lib.) Magn., leaf spot. 
Melanomma... e. g. M. glumarum Miy., glume blotch of rice. 
Mosaic diseases 
Mycosphaerella e. g. M.fragariae (Tul.) Lincl., leaf spot. 
Myxomycetes ... Slime molds. 
Necator.. e. g. N. decretus Mass., coffee twig disease. 
Nectria - e. g. N. cmnabarina Fr., coral spot. 
Nectria e. g. A", ditissima Tul., European apple canker. 
Neocosmospora. ._,... ... e. g. N. vasinfecta (Atk.) E. F. Sm., see Fusarium vasinfectum. 
Oomycetes 
Oospora ... 
Ophiobolus e. g. 0. cariceti (B. and Br.) Sacc, = 0. graminis Sacc, take-all of 
several hosts, foot rot. 
Ozonium.. e. g. O. omnivorum, see Phymatotrichum omnivorum (Shear) Dug. 
Peach rosette, yellows, little peach, 
phony peach, or other virus 
diseases 
Peanut rosette. . virus. 
Peridermium.. e. g. P. strobi, see Cronartium ribieola. 
Peronosporaceae Downy mildews. 
Phoma e. g. P.oleraceae Sacc = P. lingam (Tode) Desm., blackleg, cabbage 
black spot. 
Pestalozzia.. e. g. P. guepini Desm., probably = P. theae Saw., = gray blight of tea. 
Phomopsis e. g. P. citri Fawc, melanose, stem-end rot. 
Phragmidium e. g. P. subcorticinum (Schrank) W int., rose rust. 
Phycomyces 
Phyllosticta . - e. g. P. prunicola (Opiz) Sacc, leaf spot, scurf, shot hole. 
Phymatotrichum e. g. P. omnivorum (Shear) Dug., root rot of cotton. 
Physalospora e. g. P. cydoniae Am. auct., see P. malorum (Pk.) Shear. 
Physalospora e. g. P. malorum (Pk.) Shear, black rot of apple. 
Physoderma e. g. P. zeae-maydis Shaw, brown spot. 
Phytomonas e. g. P. rubrilineans, see Bacterium rubrilineans. 
Phytophthora... e. g. P. citrophthora (Sm. and Sm.) Leonian, brown rot, gummosis of 
citrus. 
Phytophthora e. g. P. injestans (Mont.) D. By., late blight of potato. 
Piricularia e. g. P. o~yzae Br. and Cav., = P. grisea (Cke.) Sacc, rice blast. 
Plasmodiophora e. g. P. brassicae Wor., club root of cabbage. 
Plasmopora... e. g. P. viticoln (Berk, and Curt.) Berl and De Toni, downy mildew of 
grape. 
Plasmopora e. f>. P. humuli Miy. and Tak., downy mildew of hops. 
Plowrightia.. e. g. P. morbosa, see Dibotryon morbosum. 
Podosphaera e. g. P. oryacanthae (DC.) D. By., mildew of apple and cherry, 
powdery mildew. 
Polyporus... -- e. g. P. ponderosus Schrenk, red rot of pine. 
Polystictus e. g. P. versicolor (L.) Fr., soft heart rot, heart rot, yellowish wood rot 
of Catalpa. 
Pseudomonas e. g. P. citii, see Bacterium citri. 
Pseudoperonospora e. g. P. humuli, see Plasmopara humuli. 
Pythiacistis.. e. g. P. citrophthora, see Phytophthora citrophthora. 
Pythium. e. g. P. palmivorum Butler, bud rot of palms. 
Ramularia.. e. g. R. necator Mass., cacao seed mold. 
Khizoctonia e. g. R. solani, see Corticium vagum. 
Rosellinia e. g. R. necatrii (R. Hart.) Berlese, white root rot. 
Sclerospora e. g. S. macrospora Sacc. downy mildew of maize and wheat. 
Sclerotinia e. g. S. cinerea (Bon.) Schroet., blossom blight of sweet cherry. 
Sclerotium e. g. S. rolfsii Sacc, many hosts, probably several specific confused, 
stem rot, southern blight. 
Septoria e. g. 8. petroselini Desm., var. apii Br. and Cav., late blight of celery. 
Sphaceloma e. g. S. populi (Sacc.) Jenkins, poplar leaf scab. 
Sphaerella... e. g. S.jragariae, strawberry leaf spot. 
Sphaeronema 
Sphaeropsis e. g. 5?. malorum, see Physalospora malorum. 
Sphaerostilbe.. e. g. S. flarida Mass., coffee spot. 
Sphaerotheca e. g. S. pannnsa (Wallr.) Lev., mildew of peach, rose mildew, powdery 
mildew of rose. • 
Spongospora. e.g. S. subterrauea (Wallr.) T. Johnson, powdery scab of potato. 
Sporotrichum e. g. 8. anthophilum Pk., bud rot of carnation. 
Spotted wilt of tomato, virus disease. 
Stereum e. g. S. purpureum Pers., silver leaf. 
Synchytrium endobioticum (Schilb.). Perc, potato wart. 
Taphrina. e.g. T.bullata (Berk.) Tul., pear-leaf blister. 
Thielavia e. g. T. basicnlu (B. and Br.) Zopf., end rot, fiber rot, black rot of 
tobacco, etc. 
Tilletiaceae Smuts. 
Trametes... e. g. T. pini (Brot.) Fr., honeycomb rot, dry rot of pine. 
Trichoderma e.g. T. koningi Oud., a soil fungus. 
Tubercularia e. g. T. vulgaris, see Nectria cinnabarina. 
Uncinula e. g. U. spiralis U, necator (Schw.t Burr., powdery mil' lew of grape. 
Credineae.. Rusts. 
Urocystis e. g. ( T . cepuku i'.C. Frost, onion smut. 
Urophlyctis. e.g. V. aljalfae (Lagn.) Magn., crown wart, crown gall of alfalfa 
(lucerne). 
Ustilaginaceae. Smuts 
Valsa e.g. V. leucostoma (Pers.) Fr., dieback. 
Venturia e. g. V. inaequalis (Cke.) \uYrh , apple scab. 
Vermicularia e.g. V circinam, see Colletotrichum circinaru. 
Xylaria e. t:. X.thwaitesii Cke., rot of Bevoa. 
