with nutrient agar, Czapek-Dox agar, starch nitrate solid media,
or with their broths. The herbicide-amended agar media at 40°C
were mixed with the inoculum suspension to reach a density of
1 X lo2 cells/mL. The plates were incubated at 28'C for 48 h and
the number of cells were counted. For determination of radial
growth of F. oxysporurn, aliquots of the herbicide were mixed aseptically
with Czapek-Dox agar to give the proper concentration and
poured into Petri dishes.