. Minnesota plant diseases. Plant diseases. Minnesota Plant Diseases. 351 \. leaf and these spots often occur in sufificient numbers to con- siderably damage the plant. The winter spores are two-celled. Spraying with dilute bordeaux has been recom- mended just as the buds are opening and the leaves are expanding, and at in- tervals later. The fallen / leaves should be burned, i * Apple scab [Venturia |*\ pomi (Fr.) Wint.]. Ap- ^ pie scab is by far the most serious disease of apples. The fungus first appears in early summer on the leaves of the apple tree as light, greyish, circular Fio. lS3.—A
. Minnesota plant diseases. Plant diseases. Minnesota Plant Diseases. 351 \. leaf and these spots often occur in sufificient numbers to con- siderably damage the plant. The winter spores are two-celled. Spraying with dilute bordeaux has been recom- mended just as the buds are opening and the leaves are expanding, and at in- tervals later. The fallen / leaves should be burned, i * Apple scab [Venturia |*\ pomi (Fr.) Wint.]. Ap- ^ pie scab is by far the most serious disease of apples. The fungus first appears in early summer on the leaves of the apple tree as light, greyish, circular Fio. lS3.—Ap?le scab on the fimt. After Clmtci. spots which spread rapidly, often combining with neighbor- ing spots to cover large areas of the leaf. The spots later turn olive green and finally black. The surface is covered with up- right threads fi'om which the summer spores are thrown ofif. These spores rap- ily increase the spread of the fun- gus from leaf to leaf and tree to tree. The spots are frequently so large and nu- merous that the leaves become Whole trees may in this way be stripped of their leaves. This sometimes happens un-. 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 Freeman, Edward Monroe, 1875-. Saint Paul, Minn.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectplantdi, bookyear1905
