Hostname: page-component-7dd5485656-zlgnt Total loading time: 0 Render date: 2025-10-29T11:33:23.090Z Has data issue: false hasContentIssue false
  • English
  • Français

Ammonium Sulfate Enhancement of Picloram Absorption by Detached Leaves

Published online by Cambridge University Press:  12 June 2017

Bruce J. Wilson  and
Roy K. Nishimoto
Bruce J. Wilson
Affiliation:
Dep. of Hort., Univ. of Hawaii, Honolulu, HI 96822
Roy K. Nishimoto
Affiliation:
Dep. of Hort., Univ. of Hawaii, Honolulu, HI 96822
Get access Rights & Permissions [Opens in a new window]

Abstract

Ammonium sulfate increased the magnitude and rate of 14C-picloram (4-amino-3,5,6-trichloropicolinic acid) absorption in detached strawberry guava (Psidium cattleianum Sabine) leaves. Absorption of 14C-picloram with or without ammonium sulfate leveled off at 6 to 12 hr. The magnitude of the ammonium sulfate-induced increase in 14C-picloram absorption was not affected by picloram concentration in the range 250 to 2000 ppmw, or by leaf age. The absorption of 14C-picloram was increased by 0.1, 0.5, 1.0, and 10% ammonium sulfate; 0.01% had no effect. Increased 14C-picloram absorption resulted from adding the ammonium salts of sulfate, nitrate, chloride, or dibasic phosphate, but ammonium sulfate was the only one of six sulfate salts to increase picloram absorption. A pH adjustment of the external solution from 6 to 4 increased picloram absorption, whereas a pH change from 6 to 8 had no effect. Both ammonium dibasic phosphate at a solution pH of 7.7 and ammonium monobasic phosphate at pH 4.6 increased picloram absorption, whereas potassium dibasic phosphate at pH 9.5 had no effect, and potassium monobasic phosphate at pH 4.6 did increase absorption.

Information

Type
Research Article
Information
Weed Science , Volume 23 , Issue 4 , July 1975 , pp. 297 - 301
Copyright
Copyright © 1975 by the 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.)

Article purchase

Temporarily unavailable

References

Literature Cited

1. Baur, J.R., Bovey, R.W., Baker, R.D., and Riley, I. 1971. Absorption and penetration of picloram and 2,4,5-T into detached live oak leaves. Weed Sci. 19:138–141.Google Scholar
2. Horsfall, F. Jr. and Moore, R.C. 1962. The effect of spray additives and simulated rainfall on foliage curvature and thinning of apples by the sodium salt of naphthaleneacetic acid. Amer. Soc. Hort. Sci. Proc. 80:15–32.Google Scholar
3. Hull, H.M. 1970. Leaf structures as related to absorption of pesticides and other compounds. Residue Rev. 31:1–150.Google ScholarPubMed
4. Lange, N.A. 1967. Handbook of chemistry. McGraw-Hill, NY. 2001 pp.Google Scholar
5. Orgell, W.H. and Weintraub, R.L. 1957. Influence of foliar absorption of 2,4-D. Bot. Gaz. 119:88–93.Google Scholar
6. Peterson, J.I. 1969. A carbon dioxide collection accessory for the rapid combustion apparatus for preparation of biological samples for liquid scintillation analysis. Anal. Biochem. 31:204–210.Google Scholar
7. Peterson, J.I., Wagner, F., Seigal, S., and Nixon, W. 1969. A system for convenient combustion preparation of tritiated biological samples for scintillation analysis. Anal. Biochem. 31:189–201.Google Scholar
8. Sargent, J.A. and Blackman, G.E. 1962. Studies on foliar penetration. I. Factors controlling the entry of 2,4-dichlorophenoxyacetic acid. J. Exp. Bot. 13:348–368.Google Scholar
9. Sargent, J.A. and Blackman, G.E. 1970. Studies on foliar penetration. VI. Factors controlling the penetration of 4-amino-3,5,6-trichloropicolinic acid (picloram) into the leaves of Phaseolus vulgaris . J. Exp. Bot. 21:219–227.Google Scholar
10. Sharma, M.P. and Vanden Born, W.H. 1970. Foliar penetration of picloram and 2,4-D in aspen poplar and balsam poplar. Weed Sci. 18:57–63.Google Scholar
11. Turner, D.J. and Loader, M.P.C. 1972. Some increases in efficacy of foliage applied herbicidal salts due to addition of ammonium ions. Proc. Brit. Weed Contr. Conf. 11:654–660.Google Scholar
12. Wilson, B.J. and Nishimoto, R.K. 1975. Ammonium sulfate enhancement of picloram activity and absorption. Weed Sci. 23:289–296.Google Scholar