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This NebGuide discusses the effects of Banvel and 2,4-D on soybean and fieldbean growth and yield.
Banvel and 2,4-D are two herbicides commonly used for postemergence control of broadleaf weeds in corn, wheat, sorghum, pastures, and around field margins. Both herbicides can be moved off target by windy conditions at the time of spraying, or they can volatilize after spraying at temperatures above 85°F and drift off target. Fieldbeans and soybeans are both sensitive to Banvel and 2,4-D, and even rates as low as 0.001 lb/acre (1/100th of the use rate) can cause visual crop injury. The degree of crop injury depends on the herbicide, rate, and crop growth stage at the time of drift.