The influence of PRE herbicides on rooting characteristics of bermudag
rass turfgrass was studied using sod plugs removed from the field. Gre
enhouse root fresh weight was reduced the greatest with dithiopyr or p
rodiamine. Pendimethalin caused fewer fresh weight reductions compared
to dithiopyr or prodiamine and these reductions were usually for a sh
ort period. Root weight loss was due to lower root density and root ma
lformation. Significant numbers of malformed roots were also observed
for greater periods of time where dithiopyr or prodiamine had been app
lied.