Abstract

In field trials carried our in 1983 at Gama and Horsham (Victoria), Hart (South Australia) and York (Western Australia), the effect of two rates of glyphosate (0.54 and 1.08 kg/ha active ingredient), applied 1-8 days before sowing, on the establishment, growth and nodulation of four cultivars of subterranean clover and 10 medic cultivars was investigated. No significant adverse effects were observed on establishment, growth or nodulation even at the high rate (2x field rate) of glyphosate. The absence of any adverse effect was attributed to rapid absorption and inactivation of glyphosate in soil and possibly also the manner of seed placement below the glyphosate-treated topsoil layer.