Answers are grounded in this paper and cite their sources.
Amounts of spray drifting downwind from a field sprayer applying picloram or paraquat were determined and compared with the damage done to bean and barley plants. Measurements downwind of a stationary spray‐boom showed that drift increases rapidly with both wind speed and boom height. It was concluded that it is possible to set a safe distance downwind for the application of a herbicide which affects plants only in the wetted areas but with a sensitive crop and many growth‐regulating materials this will be very difficult.
No takes yet. Share an insight, caveat, or question.
Byass et al. (1977) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: