Rangeland Ecology & Management

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Managing individual juniper and pinyon infestations with pelleted tebuthiuron or picloram
Author
Johnsen, T. N.
Dalen, R. S.
Publisher
Society for Range Management
Publication Year
1990-05-01
Body

Junipers (Juniperus spp.) and pinyons (pinus edulis Engelm.) are reinfesting areas from which they have been removed and are encroaching into other areas. Controlling these trees while they are small would help maintain forage production and protect the soils. Individual trees can be controlled by applications of pelleted picloram (4amino-3,5,6-trichloro-2-pyridinecarboxylic acid) and tebuthiuron [N-[5-(1,l-dimethylethyl)-l,3,4thiadiazol-2-yl]N-N-dimethylurea), but little is known of the comparative effectiveness of these herbicides on junipers and pinyon. We compared pelleted picioram and tebuthiuron on individuai alligator juniper (J. deppeana Steud.), one-seed juniper [J. monosperma (Engelm.) Sarg.], Utah juniper [J. osteosperma (Torr.) Little], and pinyon. Pellets were applied at 0.7 and 1.4 g picloram acid equivalent (a.e.) or tehuthiuron active ingredient (a.i.)/m of tree height at 3 Arizona and 3 New Mexico locations. Utah juniper and pinyon trees up to 2 m tall were killed with 0.7 g picloram a.e. or tebuthiuron a.i./m of height. One-seed junipers up to 2-m tall were killed by 0.7 g tebuthiuron a.i./m of height, but were not by picloram. Neither herbicide killed alligator juniper consistently. Some understory grasses were damaged more by tebuthiuron than by picloram. 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

Language
en
Resource Type
Text
Document Type
Journal Issue/Article
Digital Object Identifier (DOI)
10.2307/3898683
Additional Information
Johnsen, T. N., & Dalen, R. S. (1990). Managing individual juniper and pinyon infestations with pelleted tebuthiuron or picloram. Journal of Range Management, 43(3), 249-252.
IISN
0022-409X
OAI Identifier
oai:repository.arizona.edu:10150/644893
Journal Volume
43
Journal Number
3
Journal Pages
249-252
Journal Name
Journal of Range Management
Keywords
pesticide application
Pinus edulis
soil classification
tebuthiuron
brush control
picloram
range management
Juniperus
New Mexico
Arizona