The effect of four herbicides on pasture yield and composition

Abstract

Four herbicides (2,4-D, 2,2-DPA, paraquat, and diquat) were applied to a pasture in northeastern Victoria in April, May, and July of 1963 at rates recommended for the control of weeds in pastures. Each of the herbicides significantly reduced pasture productivity but this reduction was affected by the time of spraying and the time when pasture production was measured. The proportions of subterranean clover, phalaris, and annual grasses were affected by the various herbicide treatments.