The maximum level of 2,4-D detected in stream water was 5 ppb following aerial application of 2.2 kg/ha herbicide to a 238-ha watershed for big sagebrush control. Careful placement of the aerially applied herbicide, leaving an unsprayed buffer strip 30 m wide bordering the stream channel, and the presence of a snowdrift over the channel, prevented significant water contamination. Surface snow within the unsprayed buffer zone averaged 35 ppb of 2,4-D. Herbicide levels in a stream .5 km downwind from the sprayed watershed did not exceed 2 ppb immediately following spraying even though wind speeds exceeded 2.2 m/s during much of the spray period. This material was digitized as part of a cooperative project between the Society for Range Management and the University of Arizona Libraries. The Journal of Range Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information. Migrated from OJS platform August 2020
Scholarly peer-reviewed articles published by the Society for Range Management. Access articles on a rolling-window basis from vol. 1, 1948 up to 5 years from the current year. Formerly Journal of Range Management (JRM). More recent content is available by subscription from SRM.