Published online by Cambridge University Press: 12 June 2017
As early as 1946, a limited study conducted in Oregon (5) showed big sagebrush (Artemisia tridentata Nutt.) to be susceptible to the sodium salt of 2,4–D. Cornelius and Graham (3) stated that big sagebrush was highly susceptible or hypersensitive to 2,4–D. Kissinger, Hull and Vaughn (7), reporting on experiments conducted at the Beaver Rim area near Lander, Wyoming, found that the isopropyl and amyl ester of 2,4,5–T consistently gave higher kills for a given amount of chemical. One pound acid equivalent (hereafter referred to as pounds acid) of 2,4,5–T usually gave somewhat higher kills than two pounds acid equivalent of 2,4–D.