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Movement and Persistence of Karbutilate in Rangeland Soils Following Application as Spheres

Published online by Cambridge University Press:  12 June 2017

J. L. Mutz ,
C. J. Scifres ,
S. Selim  and
R. F. Cook
J. L. Mutz
Affiliation:
Texas Agric. Exp. Stn. (Dep. Range Sci.), College Station, TX 77843
C. J. Scifres
Affiliation:
Texas Agric. Exp. Stn. (Dep. Range Sci.), College Station, TX 77843
S. Selim
Affiliation:
Residue Lab., Development Dep., FMC Corp., Middleport, NY 14105
R. F. Cook
Affiliation:
Residue Lab., Development Dep., FMC Corp., Middleport, NY 14105
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Abstract

Karbutilate [tert-butylcarbamic acid ester with 3(m-hydroxyphenyl)-1,1-dimethylurea] residues were monitored in Texas Post Oak Savannah soils immediately at the point of deposition of spheres containing approximately 0.765 g active ingredient (50%, w/w). Karbutilate residues (1.1 ppmw) were detected after 194 days in clay loam to 90 cm deep directly beneath the point of impact of the spheres. Although in one of two studies trace amounts (0.1 ppmw) of karbutilate residues were detected to 45 cm deep at 90 cm away from the point of impact after 111 days, vertical movement through the soil profile was much more evident than lateral displacement. After 191 days and at the point of sphere deposition, about twice as much residual karbutilate was detected in the surface 30 cm of a clay loam as in a loamy sand.

Type
Research Article
Information
Weed Science , Volume 26 , Issue 2 , March 1978 , pp. 179 - 181
Copyright
Copyright © 1978 by the Weed Science Society of America 

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References

Literature Cited

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