Fusarium spp. root colonization
Both the glyphosate rates and the soybean growth stage when glyphosate was applied affected Fusarium spp. root colonization on GR1 and GR2 plants (Fig. 1). Fusarium spp. root colonization in GR2 was highest when glyphosate was applied at V6 growth stage relative to colonization at stages V4 and V2. Similar results were noticed for GR1; however, root colonization when glyphosate was applied at stages V2 and V4 was similar (Fig. 1). Glyphosate enhanced Fusarium spp. root colonization, proportionally with increasing glyphosate rates with both cultivars. Interestingly, roots of untreated GR2 soybean(without glyphosate) were colonized by Fusarium spp. at lower levels than on GR1 roots; however, glyphosate sig-nificantly increased Fusarium spp. infection of both GRcultivars at all rates of application (Fig. 1, Table 1).