. Annual report of the Cornell University Agricultural Experiment Station, Ithaca, Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). Fig. 162. Alfalfa leaf-spot. APPLE. Commonly known among growers as " the ; Usually most evident on the fruit. Spray with Bordeaux 5--5"50 o^ 3-3-50; first, just before the blossoms open; second, just as the blossoms fall; third, 10 to 14 days after the hlossoms fall. The second spraying seems to be the most important. Spray thoroughly. For the use of insect poisons with Bordeaux mixture, see codling-
. Annual report of the Cornell University Agricultural Experiment Station, Ithaca, Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). Fig. 162. Alfalfa leaf-spot. APPLE. Commonly known among growers as " the ; Usually most evident on the fruit. Spray with Bordeaux 5--5"50 o^ 3-3-50; first, just before the blossoms open; second, just as the blossoms fall; third, 10 to 14 days after the hlossoms fall. The second spraying seems to be the most important. Spray thoroughly. For the use of insect poisons with Bordeaux mixture, see codling-moth and BUD-MOTH. See also Cornell Bulle- tins 84 and 226. (Fig. 163.) This is the same as Pear Fire-blight, blight. It usually makes itself manifest on the ap- ple trees in three forms, blossom blight, twig blight, and blight cankers on limbs and body (Fig. 164). This disease is caused by bacteria which are distributed by bees and flies and is not controlled by spraying. Cut- ting out and destroying the diseased parts are the chief measures to be taken. Cut out blighted twigs in young trees as fast as they appear. The bacteria of this disease are carried over winter in cankers on the main limbs and bodies of the trees. Remove all sucli cankers with sharp knife cutting well into the healthy bark and wash the wound with corrosive sublimate, i part to loco of water. Then paint the wound with heavy lead oil paint. See Cornell Bulletin, 236. Destroy or clean up all old pear and apple tree's about the premises because such trees harbor the disease. This important fungous dis- ease should not be confused with the "blight ; Cankers arc usually found on the main limbs of old trees, black and rough (Fig. 165). Canker is very common on Twenty Ounce. Since the fungus enters through wounds, avoid breaking the bark. All wounds made in pruning should be promptly painted over. Cut out cankers and treat as for "blight ; Spray early in spring before the buds
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