P3821

Forest Herbicides: Calibrating Backpack Sprayers

Two of the most common herbicide questions are, “What herbicide do I use to kill it?” and “How much herbicide do I put in my spray tank?” The first question is usually not that difficult to answer using information that is readily available for herbicidal control of most plant species. However, the second question can lead to frustration between those asking the question and those attempting to provide the answer. The amount of herbicide to include in a spray mixture is not hard to determine but does depend on factors that vary among individual applicators as well as their equipment. For example, applicators may have different walking speeds and equipment as well as different ideas of what constitutes “good coverage.”

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The information given here is for educational purposes only. References to commercial products, trade names, or suppliers are made with the understanding that no endorsement is implied and that no discrimination against other products or suppliers is intended.

Publication 3821 (POD-12-25)

Adapted for use in Mississippi by Brady Self, PhD, Extension Professor, Forestry, from Backpack Sprayer Calibration for Woodland Application, Penn State Extension Forest Science Fact Sheet EE0184.