. Fig. 314.—Ctrcospora acerina. 2, Seedling of Acur, with a cotyledon brown and withered, and a leaf partially so. 4, Section through a diseased cotyledon ; the conidiophores (d) emerge from the epidermis, and bear long tapering septate conidia ; e, sclerotia formed inside the diseased tissues for hibernation. 5, Ger- minating conidia. (After R. Hartig.) C. apii Fres. Common on celery (Ajnum gravcolens) and par- snips {Pastinaca sativa) throughout all Europe and North America. It causes leaf-spots at first yellowish then enlarging and turn- ing brown. The mycelium grows in the intercellular sp
. Fig. 314.—Ctrcospora acerina. 2, Seedling of Acur, with a cotyledon brown and withered, and a leaf partially so. 4, Section through a diseased cotyledon ; the conidiophores (d) emerge from the epidermis, and bear long tapering septate conidia ; e, sclerotia formed inside the diseased tissues for hibernation. 5, Ger- minating conidia. (After R. Hartig.) C. apii Fres. Common on celery (Ajnum gravcolens) and par- snips {Pastinaca sativa) throughout all Europe and North America. It causes leaf-spots at first yellowish then enlarging and turn- ing brown. The mycelium grows in the intercellular spaces of the leaf, and gives off tufts of conidiophores through the stomata. The conidia are long, tapering, obclavate bodies with an attachment-scar at their larger ; C. asparagi Sacc. occurs on asparagus in Italy ; C. caulicola AVint. frequents the same host in America. C. Bloxami V>. et Br. On Brassica in Britain. C. armoraciae Sacc. On horse-radish. ^ Pammel. Iowa Agric. Exper, Station Bulletin, la. 1891. ^Description in New Jersey Af/ric. Exper. Station Bulletin 2, 1891.
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherl, booksubjectfungi
