. Annual report of the Cornell University Agricultural Experiment Station, Ithaca, Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). Fig. 173. Brown-rot on plum. POTATO. There are different kinds of potato blight and rot. The most Blight and rot. important are early blight and late blight — both fungous dis- eases. Early blight affects only the foliage. Late blight kills the foliage and often rots the tubers. Two serious troubles often mistaken for blight are: (i) Tip burn, the browning of the tips and margins of the leaves due to dry weather; and (2) f
. Annual report of the Cornell University Agricultural Experiment Station, Ithaca, Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). Fig. 173. Brown-rot on plum. POTATO. There are different kinds of potato blight and rot. The most Blight and rot. important are early blight and late blight — both fungous dis- eases. Early blight affects only the foliage. Late blight kills the foliage and often rots the tubers. Two serious troubles often mistaken for blight are: (i) Tip burn, the browning of the tips and margins of the leaves due to dry weather; and (2) flea-beetle injury, in which the leaves show numerous small holes and then dry up. The loss from blight and flea-beetles is enormous — often, one-fourth to one-half the crop. For blight, rot and flea-beetles spray with Bordeaux, 5-5-50. For addition of insect poisons see potato flea-beetles. Com- mence when the plants are 6 to 8 inches high and repeat every 10 to 14 days during the season, making 5 to 7 applications in all. Use from 40 to 100 gallons per acre at each application. Under conditions exceptionally favorable to blight it will pay to spray as often as once a week. See Geneva Bulletins loi, 123, 221, 241, 264, 267, 279 and 290. is caused by a fungus that Scab attacks the surface of the tubers. It is carried over on diseased tubers and in the soil. In general, when land becomes badly infested with scab it is best to plant it with other crops for sev- eral years. See Vermont Bulletin 85 and Maine Bulletin 141. QUINCE. This is a fungous disease Leaf and Fruit producing round, reddish- Spot, brown spots on the leaves and fruit. Spray three times with Bordeaux as for apple and pear scab. See Cornell Bulletin 145. (Fig. 174.). Fig. 174. Fruit-spot on 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 w
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