. Grasses of North America [microform] : chapters on the physiology, composition, selection, improving and cultivation of grasses, management of grass lands, also chapters on clovers, injurious insects and fungi. Grasses; Forage plants; Graminées; Plantes fourragères. 428 THE SCLEROTIUM DISEASE OF CLOVER. Draining the soil well, and especially replacing clover for several years by wlieat, corn, or other crops not attacked by the Sclerotinia, are recommended where it appears. A large number of fungi are spoken of as imperfect fungi from the resemblance of their fruit to the conidia or stylospor
. Grasses of North America [microform] : chapters on the physiology, composition, selection, improving and cultivation of grasses, management of grass lands, also chapters on clovers, injurious insects and fungi. Grasses; Forage plants; Graminées; Plantes fourragères. 428 THE SCLEROTIUM DISEASE OF CLOVER. Draining the soil well, and especially replacing clover for several years by wlieat, corn, or other crops not attacked by the Sclerotinia, are recommended where it appears. A large number of fungi are spoken of as imperfect fungi from the resemblance of their fruit to the conidia or stylospores of Ascomycetes. beveral of these cause diseases of grasses. The brown-spot disease of pigeon- grass, early spear-grass, and other species, is due to Septoria graminnm, (Desm.) (Fig. 173), that form a mycelium within the plant, usually killing it in places which turn brown and are finally dotted with the minute black fruit-bodies of the Fig. 173. parasite, within which slender colorless spores are produced. In Europe, a similar disease is also caused by a related fungus (DilopJiospom graminis, Desm.) whose spores differ in having brnsh-like appendages at their ends. Both are at times destructive, but affect the cereals more than the smaller grasses. Mastigosporium alhim, (Riess), and Scolecotrichum gram- inis, (Fckh), cause diseases of the leaves of grass in Europe. The l^'.st named appeared on orchard grass in great abundance about Madison, Wisconsin, in 1886. Hadrotrichum 2)hragmitis, (Fckl.), forms small, dark-brown pustules on leaves of the reed, resem- bling those of a rust-fungus, even under a hand-lens. The gray- spot disease of crab-grass is due to Pyricularia grisea (Cke.), another imperfect form that bears pear-shaped conidia on threals that protrude through the stomata of the gray spots. Sporoiolus indicus, a grass of the Southern States, somewhat esteemed for pasturage while young, is often called " black-seed grass" or "smut-gii'ss" from the
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyo, bookyear1896
