. Bulletin. Plant diseases -- United States. 172 PEACH LEAF CURLI ITS NATURE AND TREATMENT. For orchards of inediuiu to largo size it is better to obtain more powerful pumps—those capable of throwing- four strong sprays. The pimips shown in figs. 8, 9, and 10 are admirably suited for this class of work. Pumps of the type shown in fig. 8 are used in the 1,600- acre Rio Bonito orchard. In this orchard one man pumps for four men spraying (Pis. XXVII and XXVIII). In many portions of California the pneumatic pump, shown in fig. 10, is a favorite. It has been used extensively in the spraying of oran
. Bulletin. Plant diseases -- United States. 172 PEACH LEAF CURLI ITS NATURE AND TREATMENT. For orchards of inediuiu to largo size it is better to obtain more powerful pumps—those capable of throwing- four strong sprays. The pimips shown in figs. 8, 9, and 10 are admirably suited for this class of work. Pumps of the type shown in fig. 8 are used in the 1,600- acre Rio Bonito orchard. In this orchard one man pumps for four men spraying (Pis. XXVII and XXVIII). In many portions of California the pneumatic pump, shown in fig. 10, is a favorite. It has been used extensively in the spraying of orange groves where the trees are large and where high pressure is necessary to throw the spray to their tops. The pumps shown in figs. 8 and 9 have perpen-. FiG. 7.—Spray pump for iise on barrel or tank. dicular levers, thus avoiding the bending or stooping motion of the operator. The levers of each of the three stj^les shown are long, and both the strength and capacity of the pump is sufficient. The style of pimips, both for small and large orchards, to which attention is here called, will be found figured and listed in catalogues usually to be found in the hands of leading hardware dealers. Within the past few years leading orchardists and others have tested, with varying success, the application of different motive powers to the operation of spray pumps. Steam and gasoline engines have received most attention for this purpose. Many of the power. 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 United States. Division of Vegetable Physiology and Pathology. Washington : G. P. O.
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