. Diseases of economic plants. Plant diseases. 454 Diseases of Economic Plants Knapsack sprayers. — These consist of 3 to 5-gallon tanks, with straps so attached that the outfit can be car- ried upon the back in the manner of a knapsack. The handle is so adjusted that it is operated in front of the carrier. These pumps are best adapted to spraying crops which grow breast high, as grapes. They may also be used in spraying small trees. For general garden Fig. 226. — Modern power sprayer, equipped with high-pressure, slow-speed pump, with large bearings, ball valves, modern pressure regulat
. Diseases of economic plants. Plant diseases. 454 Diseases of Economic Plants Knapsack sprayers. — These consist of 3 to 5-gallon tanks, with straps so attached that the outfit can be car- ried upon the back in the manner of a knapsack. The handle is so adjusted that it is operated in front of the carrier. These pumps are best adapted to spraying crops which grow breast high, as grapes. They may also be used in spraying small trees. For general garden Fig. 226. — Modern power sprayer, equipped with high-pressure, slow-speed pump, with large bearings, ball valves, modern pressure regulator, etc. Such a machine is constructed to turn in a small space. A tower can be set on the tank for spraying tall trees with extension rods. or small areas, a half acre to an acre, they are to be recommended. Barrel pump. — For home orchard work the barrel sprayer is of most importance. The pump is adjusted to a barrel, at either the side or end. It should be provided with a good agitator to keep the spraying mixture stirred while in use. Field sprayers. — This sort of sprayer is used in spray-. 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 Stevens, Frank Lincoln, 1871-1934; Hall, John Galentine, 1870-. New York, Macmillan
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Keywords: ., bookauthorstevensf, bookcentury1900, bookdecade1920, bookyear1921
