Aerial Application of 2,4-D Plus Picloram for Green Rabbitbrush Control

Abstract

An aerially applied mixture of 2,4-D and picloram was more effective than 2,4-D alone in controlling green rabbitbrush and big sagebrush in a very droughty big sagebrush/desert needlegrass community. Herbage production had more than doubled by 5 years after the brush stand was reduced. Needleandthread was the only species to increase in density because of brush control, although considerable seed was produced from other perennial grasses. Modification of the seedbed environment is apparently necessary to establish additional desert needlegrass or Indian ricegrass plants.