Comparative Susceptibility of Honey Mesquite to Dicamba and 2,4,5-T

Abstract

Applications of dicamba controlled about the same percentage of honey mesquite (Prosopis glandulosa Torr., var. glandulosa) as equivalent rates of 2,4,5-T in the Rolling Plains, Coastal Prairie, and South Texas Plains. Combinations of 2,4,5-T and dicamba controlled no more honey mesquite than either herbicide alone. Honey mesquite control was governed by total herbicide applied rather than relative proportions of 2,4,5-T and dicamba in combination. Dicamba was effectively substituted for 2,4,5-T in combinations with picloram. Three-way combinations were no more effective than mixtures of dicamba and picloram or 2,4,5-T and picloram.