. The fungi which cause plant disease . Plant diseases; Fungi. 206 THE FUNGI WHICH CAUSE PLANT DISEASE Clanostachys theobromse "' probably as its conidial stages, is on fruits and stems of cacao. C. bahiensis Hem. reported in South America on cacao stems is really an Anthostomella; C. gigaspora ; is found on sugar-cane. Gibberella Saccardo (p. 198) Stromata tuberculate, more or less effused; perithecia cespitose or occasionally scattered on or surrounding the stroma; asci clavate, 8-spored; spores fusoid, 4 to many-celled, hyaline; conidial phase a Fusarium. Of the thirteen spec
. The fungi which cause plant disease . Plant diseases; Fungi. 206 THE FUNGI WHICH CAUSE PLANT DISEASE Clanostachys theobromse "' probably as its conidial stages, is on fruits and stems of cacao. C. bahiensis Hem. reported in South America on cacao stems is really an Anthostomella; C. gigaspora ; is found on sugar-cane. Gibberella Saccardo (p. 198) Stromata tuberculate, more or less effused; perithecia cespitose or occasionally scattered on or surrounding the stroma; asci clavate, 8-spored; spores fusoid, 4 to many-celled, hyaline; conidial phase a Fusarium. Of the thirteen species but few are parasitic. G. saubinetii (Durieu & Mont.) Sacc. "*• ^^^ Perithecia gregarious, leathery membranous, verrucose, ovate, subpedicellate, bluish, papillate, 200-300 X 170-220 fi; asci oblong clavate, acuminate, 60-76 x 10- 12 It; spores one or obliquely two-ranked, fusiform, curved or straight, acute, 4-celled, 18-24 x 4-5 n; mycelium effused, crus- FiQ. 147.—G. saubinetii; 2, Fusarium tose, white to rose colored. Co- spores, 5, the asci. After Selby. ,. - -r-, . x i-. nidia (=Fusanum) solitary, or clustered, fusiform, curved, acute or apiculate, 5-septate, hyaline, 24-40 X 5 M- Many species of Fusarium, e. g., F. culmorum, F. avenaceum, F. hordei, F. heterosporum, have been referred to this ascigerous stage. Spherical stylospores are also ;" The mycelium and the conidial stages often coat the grains and heads of cereals with red or pink. Perithecia are rare as shining dark dots on the grains in the late season. The Fusarium stage also is said to cause a clover and alfalfa disease and the fungus by inoculation and culture is shown to be identical on wheat, clover, barley, rye, spelt, emmer, and oat. It is carried from season to season on infected seed and causes large loss of young plants. Doubt as to the relationship of the Fusarial forms mentioned with the ascigerous stages has been raised by the work of Appel and WoUenweber. See al
Size: 2170px × 1152px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectfungi, bookyear1913
