. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 519 In part=Mycosph£erella, Leptosphcpria. The genus is a very large one similar to Phoma and Phyllosticta except in its spore form and in the ostiole which is frequently very large. Septoria and Phleospora are distinguished only by the lesser development of the walls of the latter and many species which in early stages pass as Phleospora would in older stages be classed as Septoria. Septoria and Rhabdospora are distinguished only by the part of the host affected, stem or leaf, and many forms in
Image details
Contributor:
The Book Worm / Alamy Stock PhotoImage ID:
RDE59BFile size:
7.2 MB (393.8 KB Compressed download)Releases:
Model - no | Property - noDo I need a release?Dimensions:
1976 x 1265 px | 33.5 x 21.4 cm | 13.2 x 8.4 inches | 150dpiMore information:
This image is a public domain image, which means either that copyright has expired in the image or the copyright holder has waived their copyright. Alamy charges you a fee for access to the high resolution copy of the image.
This image could have imperfections as it’s either historical or reportage.
. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 519 In part=Mycosph£erella, Leptosphcpria. The genus is a very large one similar to Phoma and Phyllosticta except in its spore form and in the ostiole which is frequently very large. Septoria and Phleospora are distinguished only by the lesser development of the walls of the latter and many species which in early stages pass as Phleospora would in older stages be classed as Septoria. Septoria and Rhabdospora are distinguished only by the part of the host affected, stem or leaf, and many forms in these two genera are undoubtedly identical. S. pisi West, is on peas. S. piricola Desm. on pear and apple=Mycosphserella sentina. See p. 246. S. populi Desm. on Populus=My cosphserella populi. See p. 250. S. phlogis Sacc. & Speg. on Phlox=Leptosphaeria phlogis. See p. 258. S. ribis Desm."^ Hypophyllous; spots small, irregular, bounded by the leaf veins, brownish-purple; pycnidia in- nate, minute, convex, brownish- black; cirri in mass reddish; co- nidia elongate, linear, curved, 50 M long. On gooseberry and currant, causing leaf spots and defolia- tion. S. aciculosa E. & E. Pycnidia innate to superficial, grouped, minute, amphigenous; conidia needle-shaped, continuous, 15-20 X 0.75 IX. It is found on the strawberry. S. fragariae Desm. Epiphyllous; spots suborbicular, brown, with reddish-brown margin; pycnidia minute, innate, prominent, brownish; cirri white; conidia cylindric, obtuse, 3-septate. Perhaps =Mycosphaerella fragarise. See p. 244. On strawberry, cultivated and wild, forming circular leaf spots.. Fig. 359.—S. libis, a pycnidium aud spores. After Longyear.. 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 work.. Stevens, Frank Lincoln, 1871-1934. New York : Macmillan