Published online by Cambridge University Press: 12 June 2017
Herbicidal applications to mesquite in Arizona (17), New Mexico (21), and Texas (5) indicate that the low-volatile esters of 2,4,5-trichlorophenoxyacetic acid (2,4,5-T) are usually more effective than amine salt formulations, but there have been instances where the reverse was true. This inconsistency has occurred only in isolated cases, but was of interest in that factors which affect differential susceptibility to the ester and the amine formulations are important and should be more fully understood. The purpose of this study was to determine whether mesquite has a different period of susceptibility to the ester than to the amine. Various biological and meteorological factors were also determined to test their relation to mesquite susceptibility.