Hostname: page-component-745bb68f8f-b6zl4 Total loading time: 0 Render date: 2025-02-05T07:26:27.176Z Has data issue: false hasContentIssue false
  • English
  • Français

Distribution of Picloram in Huisache after Foliar and Soil Applications

Published online by Cambridge University Press:  12 June 2017

R. W. Bovey ,
F. S. Davis  and
M. G. Merkle
R. W. Bovey
Affiliation:
Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture, Department of Range Science, Texas A&M University, College Station, Texas
F. S. Davis
Affiliation:
Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture, Department of Range Science, Texas A&M University, College Station, Texas
M. G. Merkle
Affiliation:
Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture, Department of Range Science, Texas A&M University, College Station, Texas
Get access

Abstract

The potassium salt of 4-amino-3,5,6-trichloropicolinic acid (picloram) was applied as soil, foliar, and soil plus foliar treatments to defoliated and non-defoliated huisache (Acacia farnesiana (L.) Willd) grown in the greenhouse. Soil applications of ⅛ lb/A were more effective than foliar treatments. However, soil or foliar applications at ½ lb/A were lethal on non-defoliated plants. Defoliated plants treated with ½ lb/A showed considerable regrowth, indicating that leaves were important for absorption and movement of the herbicide into stem and root tissues. Plants treated with ¼ lb/A of picloram and defoliated after 0, 4, 10, and 24 hr indicated that 24 hr were necessary to obtain maximum herbicidal effectiveness.

Picloram content was determined in the leaves, upper stem, lower stem, and roots by gas chromatographic analysis, 3, 10, and 30 days after treatment. Most of the picloram applied to foliage was found in and on the leaves 30 days after treatment. The upper stem contained several times more picloram than the lower stem. No detectable amounts of picloram were found in the leaves and upper stem 3 and 30 days after soil treatment. The concentration of picloram in roots from soil applications was similar to foliar treatments. Absorption and movement studies showed that a period of 24 hr was required to move lethal amounts of picloram into stem and root tissues of huisache after foliar treatments.

Type
Research Article
Information
Weeds , Volume 15 , Issue 3 , July 1967 , pp. 245 - 249
Copyright
Copyright © 1967 Weed Science Society of America 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Literature Cited

1. Bouse, L. F. and Bovey, R. W. 1967. A laboratory sprayer for potted plants. Weeds 15:89–91.Google Scholar
2. Bovey, R. W., Davis, F. S., Merkle, M. G., Meyer, R. E., Morton, H. L., and Bouse, L. F. 1965. Defoliation and control of brush. Proc. SWC. 18:288–292.Google Scholar
3. Bovey, R. W. 1966. Recent advances in woody plant control in the Southwest. Agron. Abstr. p. 105.Google Scholar
4. Davis, F. S., Merkle, M. G., and Bovey, R. W. 1966. The effect of moisture stress on foliar uptake and transport of picloram and 2,4,5-T in woody plants. Botan. Gaz. (In Press).Google Scholar
5. Merkle, M. G. and Davis, F. S. 1967. Effect of moisture stress on absorption and movement of picloram and 2,4,5-T in beans. Weeds 15:10–12.Google Scholar