. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 377. Fio. »73> -Cross-section of aecia of P. asparagi. After Smith. P. bullata (Pers.) Schr. is a brachy-puccinia which is autoecious on celery, parsley, dill and other Timbellifers. P. apn (Wallr.) Gda. abo occurs in its uredinial and telial stages on celery .- P. castagnei Thiim is recorded for celery in France. P. allii (D. C.) Rud. is a hemi-type on cultivated onions. P. porri Sow. is an autoecious rust which is sometimes- de- structive to onions in Europe. P. endiviae Pass.^^^ occurs on-
. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 377. Fio. »73> -Cross-section of aecia of P. asparagi. After Smith. P. bullata (Pers.) Schr. is a brachy-puccinia which is autoecious on celery, parsley, dill and other Timbellifers. P. apn (Wallr.) Gda. abo occurs in its uredinial and telial stages on celery .- P. castagnei Thiim is recorded for celery in France. P. allii (D. C.) Rud. is a hemi-type on cultivated onions. P. porri Sow. is an autoecious rust which is sometimes- de- structive to onions in Europe. P. endiviae Pass.^^^ occurs on- endive in Italy and America. P. phragmitis «-2« I (=^. rubelliun). Peridia oh circular red spots 'cm. in diameter, shallow, edges white, torn. Spores white, subglobose, echinulate, 15-16 m in diameter. II. Uredinia rather large, dark brown, elliptical, pulverulent, without paraphyses. Spores ovate or elliptical, echinulate, brown, 25-35 X 15-23 /i. III. Telia large, long, sooty black, thick, often confluent. Spores elliptical, roimded at both ends, markedly constricted in the middle, dark blackish-brown, smooth, 45-65 x 16-25 n. Pedi- cels very long, 150-200 x 5-8 n, yellowish, filmly attached. Heteroecious; I on Rumex and rhubarb, II and III on Phrag- mitis. Found only rarely in America,^^'" ^** except in the middle west. P. cyan! (Schl.) Pass, is on cultivated Centaurea. P. tragopogonis (Pers.) Cda. I. jEcia on the whole plant—leaves, stems, bracts, receptacles —shortly cylindrical, at first mammseform, peridia with whitish, torn edges. Spores rounded, verrucose, orange-yellow, 18-27 n, sometimes as much as 35 m long. Mycelium diffused throughout the host-plant. III. Telia brown, few, small, scattered, elliptical or 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 Steven
Size: 2170px × 1152px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectfungi, bookyear1913
