File:Concentrate spraying in deciduous orchards (1958) (20684199121).jpg

Title: Concentrate spraying in deciduous orchards
Identifier: concentratespray00cana (find matches)
Year: 1958 (1950s)
Authors: Canada. Dept. of Agriculture. Entomology Research Institute; Marshall, James
Subjects: Apples; Spraying and dusting in agriculture; Pulvérisation et poudrage en agriculture; Pulvérisation
Publisher: Ottawa (Queen's Printer)
Contributing Library: Agriculture and Agri-Food Canada – Agriculture et Agroalimentaire Canada
Digitizing Sponsor: Agriculture and Agri-Food Canada – Agriculture et Agroalimentaire Canada

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39 positions on the spray frame. Examination of the 30 mounted sprayed strips gives information on the spray pattern. Large stains on the lower cards, for example, indicate coalescence of droplets and overspraying. Little or no deposit on the uppermost cards indicates that the machine lacks capacity for spraying treetops (Fig. 13). A uniform, finely stippled deposit from the five- foot level to the 25-foot level, with the machine nine to 11 feet from the frame, is evidence of efficient operation (Fig. 12). Sometimes only the white cards are used in the assessment. But, when greater assurance is required, the glass slides and chemical analyses are brought into play. Then, as a final step, the evidence of performance from the mounted cards is compared with the data from the chemical analyses.
Text Appearing After Image:
Figure 13—Mounted cards showing performance of an inefficient concentrate sprayer; heavy overspraying at low levels, insufficient coverage at high levels.

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