. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 563 nected but confirmation of such conclusion has not been ad- duced. Connection with Coccomyces has also been reported.^^^ C. tubeufiana All., also on Prunus is closely like C. padi. C. pomi Brooks.211-212 Acervuli pallid, subeffuse, at first subepidermal, then erumpent; conidia granular, filiform, straight or flexuose, 15-80 x 2-2.5 m- It is reported as common from New Hampshire to Virginia and Michi- gan on apples of almost all varieties, causing small, dry, sunken, brown fruit spots; a disea

. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 563 nected but confirmation of such conclusion has not been ad- duced. Connection with Coccomyces has also been reported.^^^ C. tubeufiana All., also on Prunus is closely like C. padi. C. pomi Brooks.211-212 Acervuli pallid, subeffuse, at first subepidermal, then erumpent; conidia granular, filiform, straight or flexuose, 15-80 x 2-2.5 m- It is reported as common from New Hampshire to Virginia and Michi- gan on apples of almost all varieties, causing small, dry, sunken, brown fruit spots; a disea Stock Photo
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. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 563 nected but confirmation of such conclusion has not been ad- duced. Connection with Coccomyces has also been reported.^^^ C. tubeufiana All., also on Prunus is closely like C. padi. C. pomi Brooks.211-212 Acervuli pallid, subeffuse, at first subepidermal, then erumpent; conidia granular, filiform, straight or flexuose, 15-80 x 2-2.5 m- It is reported as common from New Hampshire to Virginia and Michi- gan on apples of almost all varieties, causing small, dry, sunken, brown fruit spots; a disease which had hitherto been referred to a variety of causes. The fungus was studied in numerous fig. sso.—Cyiindrosporium culture media and its pathogenicity was p°J?}-. , ^P°''i fo™at;on in ^ " •> artificial cultures. After proved by moculations. Brooks. C. chrysanthemi E. & D.=» Spots subindefinite, 1 cm. or more broad, black; acervuli innate, amphigenous, 100-170 n; conidia fusoid straight, 50-100 x 3-4.5;x. The fungus causes dark blotches on the leaves of chrysanthemum. C. clematidis E. & E. Spots amphigenous, reddish-brown, round or subangular, 1-3 /i; acervuli comparatively few, epiphyllous, immersed, scattered; co- nidia fusoid-linear, 75-80 x 2.5-3 m, somewhat curved, exuding in a white mass. It causes leaf spot of Clematis. ^^ Later is described a variety jackmanii which differs from the species in the acervuli not being confined to the spots, which are less definite, and exud- ing a black mass of spores which are themselves hyaline. C. humuli E. & E. Spots amphigenous, mostly hypophyllous, small, angular, limited by the veinlets, rusty brown; acervuli minute, black, amphigenous; conidia nearly cylindric, granular, 40-50 x 3 m, oozing out in a white mass. The cause of leaf spots of hops.^^ Other parasitic forms are: C. saccharinum E. & E. on maple; C. colchici Sacc. on Colchicum; C. inconspicuum Wint. on lily;. Please note that these imag

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