Transpiration-retardant properties of picloram (4-amino-3,5,6-trichloropicolinic acid) were evaluated for utility in water conservation projects in the chaparral vegetation type. A subirrigation volumetric technique with potted plants was used to investigate the effects of sequentially applied foliage sprays on shrub live oak (Quercus turbinella). The treatments proceeded from low-dosage and low-volume sprays to high-volume sprays in which the soil was shielded to prevent root uptake. A single spray of 0.56 kg/ha in 93.5 liters (0.5 lb/A in 10 gal) temporarily reduced transpiration approximately 20 percent, without visible leaf injury. Two additional treatments at the same dosage reduced initial transpiration 36 percent and caused 13 percent leaf injury. A fourth treatment of 2.24 kg/ha in 374 liters (2 lb/A in 40 gad reduced initial transpiration 51 percent accompanied by 27 percent leaf injury. A final wetting spray with the same mixture caused rapid and complete reduction in transpiration, but killed all leaves. The antitranspirant effect of picloram at sublethal dosages on shrub live oak is too slight to be hydrologically significant. Forest Sci. 24:217-221.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
water yield improvement
Document Type: Miscellaneous
Plant Physiologist at the Forestry Sciences Laboratory, Rocky Mountain Forest and Range Experiment Station, USDA Forest Service, Tempe, Arizona 85281, in cooperation with Arizona State University
Publication date: 1978-06-01
More about this publication?
is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management. Forest Science is published bimonthly in February, April, June, August, October, and December.
2016 Impact Factor: 1.782 (Rank 17/64 in forestry)Average time from submission to first decision:
June 1, 2016 to Feb. 28, 2017 Also published by SAF: Journal of Forestry Other SAF Publications
- Submit a Paper
- Membership Information
- Author Guidelines
- Ingenta Connect is not responsible for the content or availability of external websites