. Control of watermelon anthracnose by spraying. Control of Watermelon Anthracnose by Spraying. 7 COST OF SPRAYING. In 1919 the cost of spraying an acre of melon vines once was about 95 cents. This includes the cost of labor and materials, but does not take into account the depreciation of the machinery. PREPARATION OF BORDEAUX MIXTURE. In order that spraying may be accomplished in an effective and economical waj^ it is necessary that the application be made quickly as well as thoroughly-. Consequently, it is well worth while to pre- pare for mixing the solution in advance of the day on which
. Control of watermelon anthracnose by spraying. Control of Watermelon Anthracnose by Spraying. 7 COST OF SPRAYING. In 1919 the cost of spraying an acre of melon vines once was about 95 cents. This includes the cost of labor and materials, but does not take into account the depreciation of the machinery. PREPARATION OF BORDEAUX MIXTURE. In order that spraying may be accomplished in an effective and economical waj^ it is necessary that the application be made quickly as well as thoroughly-. Consequently, it is well worth while to pre- pare for mixing the solution in advance of the day on which the work is to be done by making stock solutions, from which the Bordeaux mixture can be prepared quickly. Purchase quicldime (not air slaked) and copper sulphate early in the season, in such quantities as to secure wholesale prices. Pro- vide wooden buckets for dipping the copper-sulphate and Bordeaux solutions and also four or more 50-gallon wooden barrels. These should be marked inside by driving several nails to indicate the. Pig. 5.—The 4-wheeled sprayer shown in figure 2 in operation. Four men are required to handle the outfit. One drives, the man behind sprays the first row on each side of the machine, and the other two men the second and third rows, right and left, six rows in all. The man in the rear is applying the spray by directing it sidewise, holding the nozzle slightly above the foliage. This insures good penetration of the foliage. water line when containing 25 gallons of water. Then one or more days before spraying, make stock solutions of bluestone and lime, proceeding as follows: Place 25 gallons of water in a wooden barrel and dissolve 50 pounds of bluestone in this. This can be done conveniently by suspending a gunny sack containing the bluestone just below the surface of the water. About 24 hours will be required for the chemical to dissolve. Cover the barrel to prevent evaporation, or dilution in case of heavy rainfall. Slake 50 pounds or more of quickl
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