Response ofFusarium solanif. sp.pisiandPythium ultimumto Glyphosate

Abstract

The effect of glyphosate on growth and reproduction of two pathogenic fungi of green peas was evaluated in laboratory studies. Liquid and agar media containing 0 to 50 mM glyphosate were inoculated with two isolates each ofFusarium solanif. sp.pisiandPythium ultimum.Mycelial growth and spore production of the fungi were inhibited or stimulated by glyphosate, depending on concentration. Glyphosate did not affect pathogenicity ofF. solanif. sp.pisi.The effect of glyphosate on pathogenicity ofP. ultimumwas not determined. Under field conditions, glyphosate probably would not affect pathogenicity or survival of either fungus.