Explain how to calibrate a hose-end sprayer for uniform pesticide application.

• A. Simply adjust the nozzle until it sprays a consistent pattern without testing.
• B. Shake the bottle and spray until empty.
• C. Determine output with a catch cup over a set time, adjust nozzle setting to meet target rate, test spray on paper for uniform coverage, and calibrate per 1000 sq ft.
• D. Calibrate by weighing the sprayer after use.

Answer: (C)

Calibrating a hose-end sprayer for uniform pesticide application hinges on knowing exactly how much product is being applied and how evenly it covers the target area. First, measure the actual output from the nozzle over a set time using a catch cup. This tells you the real flow rate you’re delivering. Then adjust the nozzle setting so the flow matches the desired rate for the target area, based on the pesticide label. After dialing in the rate, test spray onto paper or another flat surface to check for uniform coverage and droplet consistency, making any needed tweaks to pattern or distance. Finally, convert that verified rate to a per‑1000‑square‑foot basis so you can apply the correct amount across the entire area. This sequence is essential because it verifies both the amount applied and how evenly it covers the area, rather than relying on a guess about pattern or just spraying until the bottle is empty.