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Influence of Foam Adjuvants on Activity of Selected Herbicides

Published online by Cambridge University Press:  12 June 2017

H. G. Mccall ,
C. J. Scifres  and
M. G. Merkle
H. G. Mccall
Affiliation:
Dep. of Range Sci., Soil and Crop Sci., Texas A&M Univ., College Station, TX 77843
C. J. Scifres
Affiliation:
Dep. of Range Sci., Soil and Crop Sci., Texas A&M Univ., College Station, TX 77843
M. G. Merkle
Affiliation:
Dep. of Range Sci., Soil and Crop Sci., Texas A&M Univ., College Station, TX 77843
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Abstract

Three blended foam adjuvants increased 2,4,5-T [(2,4,5-trichlorophenoxy)acetic acid] uptake from aqueous solutions by detached live oak (Quercus virginiana Mill.) leaves as compared to uptake from water alone. There were no differences in honey mesquite [Prosopis juliflora (Swartz.) D.C. var. glandulosa (Torr.) Cockerell] control with 2,4,5-T or 1:1 combinations of 2,4,5-T with picloram (4-amino-3,5,6-trichloropicolinic acid) or with dicamba (3,6-dichloro-o-anisic acid) at 0.56 kg/ha whether applied in water + 0.5% (v/v) foam adjuvant or in a diesel oil: water (1:4, v/v) emulsion. Residual life of picloram in native forages was not extended by foam carrier as compared to water, water and surfactant, and diesel oil:water emulsion as carrier. Foam generation from adjuvants with expansion ratios (ER) of two to four was less susceptible to alteration from addition of commercially-formulated herbicides than was an adjuvant with an ER of seven. Foam adjuvant ER's increased in a curvilinear fashion as water temperature was increased from 5 to 50 C.

Type
Research Article
Information
Weed Science , Volume 22 , Issue 4 , July 1974 , pp. 384 - 388
Copyright
Copyright © 1974 by the Weed Science Society of America 

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References

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