. Carnegie Institution of Washington publication. . Black Spot of the Plum, (i) Surface of a green plum (x 10), showing a white speck 'stomal in center of a very small spot, due to Bad. pruni. This is the earliest stage of the disease clearly visible to naked eye. Each of the numerous white specks has a single stoma in its center. (2) One of the tiny white specks more highly magnified so as to show the central stoma, x 200 (?). (3 and 4) Two sections through a normal stoma on the green fruit, showing empty sub-stomatic chamber; one passes through the center, x 200 ('). (5) A group of small spo
. Carnegie Institution of Washington publication. . Black Spot of the Plum, (i) Surface of a green plum (x 10), showing a white speck 'stomal in center of a very small spot, due to Bad. pruni. This is the earliest stage of the disease clearly visible to naked eye. Each of the numerous white specks has a single stoma in its center. (2) One of the tiny white specks more highly magnified so as to show the central stoma, x 200 (?). (3 and 4) Two sections through a normal stoma on the green fruit, showing empty sub-stomatic chamber; one passes through the center, x 200 ('). (5) A group of small spots on a green Hale plum, each of the smaller ones showing clearly a stoma in its center xioC?). (6 and 7) Small spots (x 10) showing bacterial exudate. Spots further advanced than in fig. 1. In fig. 6, bacteria were issuing from 30 or 40 stomata, but, as in fig. 7. the central drop is larger. The reason for this is apparent at once on cross-section (see plate 5).. 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 Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
Size: 972px × 2571px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcarnegie, bookcentury1900, bookdecade1910, bookyear1911
