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| Publication Type:
| Refereed |
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| Author(s): | Hunter, James H.;
Hsiao, Andrew I.;
McIntyre, Gordon I. |
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| Author Affiliation: | Res. Scientists, Agric. Can. Res. Stn., Saskatchewan, Canada |
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| Title: | Effect of nitrogen on the glyphosate-induced inhibition of rhizome bud growth in quackgrass (Elytrigia repens) |
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| Source: | Weed Science. Vol. 41, No. 3, July-September 1993, p. 426-433. |
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| Publishing Information: | Champaign, IL: Weed Science Society of America |
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| # of Pages: | 8 |
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| Keywords: | TIC Keywords: Elymus repens; Nitrogen; Glyphosate; Rhizomes
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| Abstract/Contents: | "In experiments conducted under controlled conditions, glyphosate-induced inhibition of rhizome bud growth in quackgrass was reduced by increasing the nitrogen (N) concentration in the nutrient solution from 10.5 to 210 mg L-1 either 2 or 4 d before foliar application of the herbicide, and for 7 d after the herbicide treatment. The additional N reduced the glyphosate-induced inhibition of rhizome growth on the intact plant at the lowest glyphosate dosage (2.8 [Mu]g per plant) but had no significant effect at higher dosages. Both the 2- and 4-d high N treatments significantly increased the lenght, dry weight, and water content of the lateral buds by the time the herbicide was applied. They also increased bud growth on the glyphosate-treated plants during the 7 d following the herbicide application and promoted release of the buds from inhibition during a subsequent bioassay of their regenerative growth on excised, single-node rhizome segments. These effects of N supply interacted significantly with glyphosate dosage, bud position on the rhizome, and duration of incubation. It is postulated that bud growth response to increased N supply may reduce the inhibiting effect of the herbicide by diluting the glyphosate concentration in the bud, or that the additional N may counteract the toxic action of glyphosate on amino acid metabolism or protein synthesis." |
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| Language: | English |
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| References: | 25 |
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| Note: | Figures
Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Hunter, J. H., A. I. Hsiao, and G. I. McIntyre. 1993. Effect of nitrogen on the glyphosate-induced inhibition of rhizome bud growth in quackgrass (Elytrigia repens). Weed Sci. 41(3):p. 426-433. |
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