The effect of herbicides on doublegee (Emex australis) and associated pasture species

Abstract

The results of trials to control doublegee (Emex australus Steinh.) undertaken with some of the more recently developed herbicides are presented. Herbicides tested were dicamba, monuron, five triazine derivatives, diquat, 2,4-D, and D.N.B.P. Of these dicamba was outstanding. At the rate of 2 oz active ingredient per acre a complete kill of plants up to four inches in diameter was obtained. For larger plants the rate had to be doubled. The effect of each herbicide on the pasture species present is reported. The dicamba treatments eliminated clovers present but did not affect the grasses. The spraying was delayed until an optimum germination had occurred.