. A manual of poisonous plants, chiefly of eastern North America, with brief notes on economic and medicinal plants, and numerous illustrations. Poisonous plants. Fig. 104. Wheat Scab (Gibberella Saubinetii), perfect form of Fusarium roseam I. 1. Wheat aSfected with wheat scab, upper portion destroyed. 2. Glumes covered with perithecia. 4. Perithecia. 5. Asci from perithecia with ascospores, one of these enlarged at 6. 7. Conidiophore and spores grown in agar. After Selby. Fusarium roseum, Link Mycelium whitish or varying from yellow to orange, appearing at the time when the grain begins to tu
. A manual of poisonous plants, chiefly of eastern North America, with brief notes on economic and medicinal plants, and numerous illustrations. Poisonous plants. Fig. 104. Wheat Scab (Gibberella Saubinetii), perfect form of Fusarium roseam I. 1. Wheat aSfected with wheat scab, upper portion destroyed. 2. Glumes covered with perithecia. 4. Perithecia. 5. Asci from perithecia with ascospores, one of these enlarged at 6. 7. Conidiophore and spores grown in agar. After Selby. Fusarium roseum, Link Mycelium whitish or varying from yellow to orange, appearing at the time when the grain begins to turn; the head, or part of it, has a whitish appearance and the chaff is glued together; conidiophores branched, spores terminal or lateral, crescent shaped at first, 1-celled, finally 2 or more celled; color of the conidia white or in masses orange or pink. According to Saccardo the ascigerous stage is the Gibberella Saubinettii (Mont.) Sacc. with gregari- ous perithecia, coriaceous, or somewhat membranaceous; somewhat blackish in color, asci oblong, lanceolate, ascospores fusiform, 3-celled. Definite cul- tural experiments have not been made in this country to determine the relation of this fungus to the F. heterosporum. According to Burrill and Barrett * several forms of Fusarium occur on corn. Saccardo in a letter to the writer identified the common Iowa Fusarium on corn as F. heterosporum. The Fusarium heterosporum Nees, is common in parts of Germany, and Tubeuf quotes Frank as stating that the destruction of rye is total in some * Bull. 111. Agrl. Exp. Sta. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Pammel, L. H. (Louis Hermann), 1862-1931. Cedar Rapids, Ia. , The Torch Press
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