Control of honey mesquite with herbicides: influence of plant height

Abstract

Stands of honey mesquite (Prosopis glandulosa var. glandulosa) were treated with aerially applied herbicides at 16 locations in western and northwestern Texas over an 8-year period to determine influence of plant height on herbicide efficacy. Plant height was not found to significantly (P<0.05) influence effectiveness of a particular herbicide, but taller plants were found consistently to be more resistant. No basis was found for delaying control of honey mesquite with herbicides until plants reach a particular height.