. Control of watermelon anthracnose by spraying. 6 Department Circular 90, U. S. Department of Agriculture. APPARATUS, SPRAYING MATERIALS, AND LABOR REQUIRED. The following outline has been prepared for the purpose of assist- ing the grower in the purchase of apparatus and supplies and in planning his work: (1) Gasoline-power spray pump, able to deliver the spray mixture to sis nozzles at 150 pounds pressure or more. The pump should be lined with brass or porcelain. (2) Three leads of §-inch hose, one 15 to 20 feet long behind the machine and the others each 30 feet long, extending one on each
. Control of watermelon anthracnose by spraying. 6 Department Circular 90, U. S. Department of Agriculture. APPARATUS, SPRAYING MATERIALS, AND LABOR REQUIRED. The following outline has been prepared for the purpose of assist- ing the grower in the purchase of apparatus and supplies and in planning his work: (1) Gasoline-power spray pump, able to deliver the spray mixture to sis nozzles at 150 pounds pressure or more. The pump should be lined with brass or porcelain. (2) Three leads of §-inch hose, one 15 to 20 feet long behind the machine and the others each 30 feet long, extending one on each side of the machine and supported by a folding boom. Extra lengths of hose should be kept on hand. (3) Three 4 to 6 foot bamboo extension rods, each equipped with a faucet cut-off at the hose end and with Y fittings at the nozzle end. (4) Six angle (45°) disk nozzles, two for each extension rod. Extra nozzles should be kept on hand. (5) Four or more wooden barrels for use in mixing the solution. (6) Wooden buckets for dipping the bluestone solution. (7) A strainer for the Bordeaux mixture made of brass wire having 18 meshes to the inch. (8) Copper sulphate (bluestone). (9) Quicklime (stone lime not air slaked). If necessary, hydra ted lime may be Fig. 4.—The pump in operation. As melons are frequently the first crop planted on new land, stumps are likely to be numerous. In such fields It is best to use a 2-wheeled machine, with the greatest possible clearance between the ground and the tank. In ordering the spraying materials it is best to estimate in each case that about 4 pounds per acre will be required for each appli- cation. The force required to operate such an outfit as that recommended will consist of a driver, three men to apply the spray, and a team of mules or horses. (Figs. 7 and 8.) It is often convenient to have tAvo additional men for preparing the Bordeaux mixture. If this work is done at some distance from the field, time may be saved and wear on th
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