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Web URL(s): | http://onlinelibrary.wiley.com/doi/10.1002/ps.2780380214/pdf Last checked: 01/31/2014 Requires: PDF Reader Access conditions: Item is within a limited-access website |
Publication Type:
| Refereed |
Author(s): | Gaskin, Robyn E.;
Stevens, Peter J. G. |
Author Affiliation: | New Zealand Forest Research Institute, Rotorua, New Zealand |
Title: | Antagonism of the foliar uptake of glyphosate into grasses by organosilicone surfactants: Part 2: Effects of surfactant structure and glycerol addition |
Source: | Pesticide Science. Vol. 38, No. 2/3, 1993, p. 193-200. |
Publishing Information: | Barking, Essex: Elsevier Science Publishers LTD |
# of Pages: | 8 |
Related Web URL: | http://onlinelibrary.wiley.com/doi/10.1002/ps.2780380214/abstract Last checked: 01/31/2014 Notes: Abstract only |
Keywords: | TIC Keywords: Antagonism; Foliar feeding; Glycerol; Nutrient uptake; Organosilicone; Product evaluation; Product profile; Surfactants
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Abstract/Contents: | "A systematic investigation into the effects of a range of organosilicone surfactants on the foliar uptake of radiolabelled glyphosate into wheat revealed significant antagonism associated with the chemical structure of these adjuvants. Rates of herbicide uptake were influenced by the ratio of the ethylene oxide (EO) hydrophile to siloxane hydrophobe, the mean EO chain length of the surfactant and the chemical nature of the terminal group on the EO chain. In general, antagonism was reduced, or even eliminated, by increasing the polarity of the organosilicone surfactant molecule. Typically, these surfactants markedly enhanced the initial rate of glyphosate uptake, which then slowed abruptly to reach a maximum within 4 h, in contrast to the approximately linear uptake response of the herbicide alone over 24 h following foliar application. The addition of glycerol further increased the initial rapid rate of glyphosate uptake in the presence of an organosilicone, but had no effect on the subsequent slowing down of foliar uptake. These findings are discussed in relation to the possible mechanisms by which these surfactants affect the cuticular penetration of glyphosate." |
Language: | English |
References: | 36 |
See Also: | See also:" Antagonism of the foliar uptake of glyphosate into grasses by organosilicone surfactants: Part 1: Effects of plant species, formulation, concentrations and timing of application" Pesticide Science 38(2-3) 1993, p.185-192 R=157016 R=157016 |
Note: | Figures Tables Graphs |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Gaskin, R. E., and P. J. G. Stevens. 1993. Antagonism of the foliar uptake of glyphosate into grasses by organosilicone surfactants: Part 2: Effects of surfactant structure and glycerol addition. Pest Manage. Sci. 38(2/3):p. 193-200. |
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| MSU catalog number: b2219665 |
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