. Diseases of cultivated plants and trees. Plant diseases; Plants -- Wounds and injuries; Plants, Protection of; Trees -- Diseases and pests. 214 DISEASES OF CULTIVATED PLANTS conidia elliptical, olive, about i6 /x long. Pycnidia resembling the perithecia, containing elliptical pale yellow, 3-septate stylospores, 10-12x6-7 /x. Spermogonia also similar to the perithecia, producing very minute spermatia. Perithecia crowded, asci cvlindric-ovate, 110-150x16-18 fx; spores. Fig. 61.—Plowrightia mcrhosa. i, portion of a plum branch, showing conidial stage of the fungus; 2, branch with ascigerous con
. Diseases of cultivated plants and trees. Plant diseases; Plants -- Wounds and injuries; Plants, Protection of; Trees -- Diseases and pests. 214 DISEASES OF CULTIVATED PLANTS conidia elliptical, olive, about i6 /x long. Pycnidia resembling the perithecia, containing elliptical pale yellow, 3-septate stylospores, 10-12x6-7 /x. Spermogonia also similar to the perithecia, producing very minute spermatia. Perithecia crowded, asci cvlindric-ovate, 110-150x16-18 fx; spores. Fig. 61.—Plowrightia mcrhosa. i, portion of a plum branch, showing conidial stage of the fungus; 2, branch with ascigerous condition of the fungus ; 3, conidiophores bearing conidia ; 4, ascus containing 8 spores. Figs, i and 2 rethiced ; rest highly mag. obvate, hyaline, i-septate, basal cell much the smaller of the two, 15-20 X 8-10 \i. The only practical method of dealing with this disease is to cut out all diseased knots. When the tree is badly infected, new knots frequently develop at or near the points from which knots have been cut away. In such cases the. 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 Massee, George, 1850-1917. New York : Macmillan
Size: 1371px × 1824px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookpublishernewyorkmacmillan, booksubjectplantdis, bookyear1910
