. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 621 Altemaria Nees. (p. 616) Conidiophores fasciculate, erect, sub-simple, short; conidia clavate-lageniform, septate, muriform, catenulate. In part=Pleospora. See p. 259. Some thirty or more species, many of pronounced economic im- portance. A. sp. on Tropceolum=Pleospora tropoeoli. See p. 260. A. trichostoma Died, on barley=Pleospora trichostoma. See p. 260. A. forsythise Harter.'^ Hjrphae cespitose, amphigenous; spot concentric zonate: conidia 18-60 X 10 X II. It causes subcircular leaf s
. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 621 Altemaria Nees. (p. 616) Conidiophores fasciculate, erect, sub-simple, short; conidia clavate-lageniform, septate, muriform, catenulate. In part=Pleospora. See p. 259. Some thirty or more species, many of pronounced economic im- portance. A. sp. on Tropceolum=Pleospora tropoeoli. See p. 260. A. trichostoma Died, on barley=Pleospora trichostoma. See p. 260. A. forsythise Harter.'^ Hjrphae cespitose, amphigenous; spot concentric zonate: conidia 18-60 X 10 X II. It causes subcircular leaf spots on cultivated Forsjrthia. A. brassicse (Berk.) Sacc. Conidiophores short, continuous, short-branched, apically equal, conidia elongate, fusoid, clavate, 60-80 x 14-18 ai, 6 to 8- muriform-septate, oUvaceous. On crucifers. A. brassicse (Berk.) Sacc. var. phaseoli Brun. occurs on beans in Italy. A. cucurbitse Let.^^ ^" may be identical with A. brassicse. It was noted by Thax- ter in Connecticut causing blight of melons. The black Fig. 419.—A. violae, germinating spores. , , . - , 1 11 After Dorsett. mold is copious in the older circular spots. Pure cultures were obtained and successful in- oculations were made on normal iminjured melon leaves. It is also reported by Selby^^* as the probable cause of muskmelon leaf spots in Ohio, and it is a common source of troubles on various cruciferous hosts. A. tenuis Nees.'® is reported by Behrens on tobacco seedlings. A. violae G. & D. '» Conidiophores erect, pale-olive, septate, simple, 25-30 x 4 ^t, conidia in chains at or near the apex of the conidiophore, clavately. 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 Stevens, Frank Lincoln, 1871-1934. New York : Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfungi, bookyear1913
