Calibrating Hand-Held and Backpack Sprayers for Applying Pesticides

Publication Number 456-502, Posted March 1997
This is a revision of VCE Publication 456-502, Calibrating Hand-Held and Backpack Sprayers for Applying Pesticides (1986) by S. M. Zedaker and T. J. Nichols (former Extension Specialist and Assistant Professor, Forestry, Virginia Tech).

Figure 2. Common types of nozzles: (A) flat-fan nozzle -- makes a narrow, oval pattern with tapered edges; (B) solid-cone nozzle -- used for spot treatment; (C) even-flat-fan nozzle -- makes a uniform pattern across its width, used for band or strip spraying; (D) adjustable nozzle common on hand-held sprayers -- adjusts from solid stream to solid cone; (E) flood nozzle, also used for band or strip spraying a wide, uniform pattern.

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