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A Comparison of Herbicide Sprays and Pellets for Control of Broadleaf Weeds in Pastures

Published online by Cambridge University Press:  12 June 2017

Herman S. Mayeux Jr.
Herman S. Mayeux Jr.*
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., Grassland, Soil Water Res. Lab., Temple, TX 76502
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Abstract

Picloram was applied broadcast on kleingrass pastures in the spring either as sprays or as pellets containing 2, 5, or 10% ae. The carrier in 5 and 10% pellets was inert clay, but 2% pellets were formulated with sufficient ammonium sulfate to contain 14.4% N. Dry formulations of picloram (10% ae), dicamba (5% ae), and tebuthiuron (20% ai) were compared to sprays at equal rates in a coastal bermudagrass pasture. Picloram was more effective as a spray than as pellets in two of five experiments. Few differences in weed control were observed with 2, 5, and 10% picloram pellets. Picloram applied up to 3 kg ae/ha as 2% pellets did not reduce kleingrass standing crop and up to 29 kg/ha of N as ammonium sulfate applied with or without picloram did not increase kleingrass production. None of the herbicides controlled weeds during the year following application.

Keywords

Dicamba, 3,6-dichloro-2-methoxybenzoic acidpicloram, 4-amino-3,5-6-trichloro-3-pyridinecarboxylic acidtebuthiuron, N-[5-(1,1-dimethylethyl)-1,3,4-thiadiazol-2-yl]-N,N′-dimethylureacoastal bermudagrass, Cynodon dactylon (L.)Pers. “Coastal” ♯3 CYNDAkleingrass, Panicum coloratum L. “Selection 75” ♯ PANCOHerbicidepicloramdicambatebuthiuronkleingrassCynodon dactylonGutierrezia dracunculoidesCYNDAGUEDR
Type
Research
Information
Weed Technology , Volume 3 , Issue 4 , December 1989 , pp. 668 - 673
Copyright
Copyright © 1989 by the Weed Science Society of America 

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References

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