Hostname: page-component-78c5997874-v9fdk Total loading time: 0 Render date: 2024-11-08T05:12:50.367Z Has data issue: false hasContentIssue false
  • English
  • Français

Dissipation of Picloram from Vegetation of Semiarid Rangelands

Published online by Cambridge University Press:  12 June 2017

C. J. Scifres ,
R. R. Hahn  and
M. G. Merkle
C. J. Scifres
Affiliation:
Dep. of Range Science
R. R. Hahn
Affiliation:
Dep. of Range Science
M. G. Merkle
Affiliation:
Soil and Crop Sci. Dep., Texas A&M Univ.
Get access Rights & Permissions [Opens in a new window]

Abstract

About 25 ppm of 4-amino-3,5,6-trichloropicolinic acid (picloram) usually were detected on grass, primarily buffalograss (Buchloe dactyloides (Nutt.) Engelm.) and blue grama (Bouteloua gracilis Willd. ex HBK Lag ex Griffiths), immediately after application of 0.28 kg/ha picloram + 0.28 kg/ha (2,4,5-trichlorophenoxy)acetic acid (2,4,5-T) in northwest Texas. Less than 1 ppm of picloram usually was detected in grass tissue 30 to 60 days after treatment. At one location, detectable picloram increased in grass tissue from 32 to 60 days after application. Increases of picloram in aerial grass tissue were attributed to root uptake during a flush of vegetative growth. Picloram dissipation from grasses was not affected by irrigation to runoff at 10, 20, or 30 days after application. Detectable picloram was reduced by 93% in herbaceous, broadleaf species by 30 days after application. Treated sand shinnery oak (Quercus havardii Rydb.) leaves at the soil surface caused a slight increase of picloram in surface litter.

Type
Research Article
Information
Weed Science , Volume 19 , Issue 4 , July 1971 , pp. 329 - 332
Copyright
Copyright © 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. Arnold, W. R. and Santelmann, P. W. 1966. The response of native grasses and forbs to picloram. Weeds 14:74–76.CrossRefGoogle Scholar
2. Bovey, R. W., Davis, F. S., and Morton, H. L. 1968. Herbicide combinations for woody plant control. Weed Sci. 16:332–335.CrossRefGoogle Scholar
3. Getzendaner, M. E., Herman, J. L., and Van Gressen, B. 1969. Residues of 4-amino-3,5,6-trichloropicolinic acid in grass from application of Tordon herbicides. T. Agr. and Food Chem. 17:1251–1256.CrossRefGoogle Scholar
4. Gould, F. W. 1962. Texas plants–A checklist and ecological summary. Texas Agr. Exp. Sta. MP-585. 112 p.Google Scholar
5. Haas, R. H., Scifres, J. C., Hahn, R. R., Hoffman, G. O., and Merkle, M. G. 1971. Occurrence and persistence of picloram in rangeland water. Weed Res. 11:54–72.CrossRefGoogle Scholar
6. McCarty, M. K. and Scifres, C. J. 1968. Smooth bromegrass response to herbicides as affected by time of application in relation to nitrogen fertilization. Weed Sci. 16:443–446.CrossRefGoogle Scholar
7. Merkle, M. G., Bovey, R. W., and Hall, R. 1966. The determination of picloram residues in soil using gas chromatography. Weeds 14:161–164.CrossRefGoogle Scholar
8. Morton, H. L., Robison, E. D., and Meyer, R. E. 1967. Persistence of 2,4-D, 2,4,5-T and dicamba in range forage grasses. Weeds 15:268–271.CrossRefGoogle Scholar
9. Robison, E. D. 1967. Response of mesquite to 2,4,5-T, picloram, and 2,4,5-T/picloram combinations. Proc. So. Weed Conf. 20:199.Google Scholar
10. Scifres, C. J., Burnside, O. C., and McCarty, M. K. 1969. Movement and persistence of picloram in pasture soils of Nebraska. Weed Sci. 17:486–488.CrossRefGoogle Scholar
11. Scifres, C. J., Hahn, R. R., Diaz-Colon, J., and Merkle, M. G. 1971. Movement and persistence of picloram in semi-arid rangeland soils and water. Weed Sci. (In press).CrossRefGoogle Scholar