“…As would be expected, any factor or combination of factors which increase the transpiration rate of plants including high light intensity and low relative humidity is apt to increase the apoplastic movement of xenobiotics whether they are applied to roots or leaves. Indeed, uptake of many herbicides, including the ureas and triazines, and the majority of fungicides and insecticides is directly proportional to the transpiration rate [40,41,54,[64][65][66][67][68][69].…”