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Web URL(s): | http://www.bioone.org/doi/pdf/10.1614/0890-037X%282003%29017%5B0366%3ACSBAFV%5D2.0.CO%3B2 Last checked: 12/13/2017 Requires: PDF Reader Access conditions: Item is within a limited-access website http://www.bioone.org/doi/full/10.1614/0890-037X%282003%29017%5B0366%3ACSBAFV%5D2.0.CO%3B2 Last checked: 12/13/2017 Requires: PDF Reader Access conditions: Item is within a limited-access website |
Publication Type:
| Refereed |
Author(s): | Williams, Walker;
Wehtje, Glenn;
Walker, Robert H. |
Author Affiliation: | Williams: Graduate Research Assistant, Department of Agronomy and Soils, Auburn University, Alabama; Wehtje and Walker: Professors, Department of Agronomy and Soils, Auburn University, Alabama |
Title: | CGA-362622: Soil behavior and foliar versus root absorption by torpedograss (Panicum repens) |
Section: | Research Other records with the "Research" Section
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Source: | Weed Technology. Vol. 17, No. 2, April-June 2003, p. 366-372. |
Publishing Information: | Champaign, IL: Weed Science Society of America. |
# of Pages: | 7 |
Keywords: | TIC Keywords: Absorption; Leaves; Roots; Postemergence herbicides; Panicum repens; Weed control; Translocation; Rhizomes; Application methods
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Abstract/Contents: | "Selective placement studies were conducted under greenhouse conditions to determine the relative importance of root vs. foliar absorption of postemergence-applied CGA-362622 by torpedograss. All application methods were equally effective in reducing torpedograss foliage as measured 4 wk after treatment. However, foliar + soil and soil-only were more effective than foliar-only in suppressing regrowth at 10 wk after treatment. Foliar absorption by torpedograss and subsequent translocation was determined with radiotracer techniques. After 72 h, 29% of the applied CGA-362622 had been absorbed, and 2 and 7% of the amount applied had accumulated in developing rhizomes and roots, respectively. CGA-362622 was more readily absorbed and translocated by the root. Hydroponically grown plants were transferred to a hydroponic solution spiked with CGA-362622 at 200 ppb. After 6 h, whole plant concentration was 113.1 ng/plant. Only 56% of amount absorbed remained in the roots, the remainder having been translocated to other tissues. The youngest leaf and the immature rhizomes accumulated 2 and 15%, respectively. CGA-362622 soil adsorption was slightly influenced by CGA-362622 concentration and greatly influenced by soil pH. Average percent recovered in the soil solution (i.e., not absorbed) was 15.3 and 27.4% at pH 5.7 and 6.7, respectively. Soil mobility was also pH dependent. Soil solution and soil mobility data support the observation that soil application followed by root entry is more effective in delivering phytotoxic concentrations to the regenerative tissues of torpedograss than foliar application." |
Language: | English |
References: | 21 |
See Also: | Other items relating to: Foliar Feeding & Uptake |
Note: | Tables |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Williams, W., G. Wehtje, and R. H. Walker. 2003. CGA-362622: Soil behavior and foliar versus root absorption by torpedograss (Panicum repens). Weed Technol. 17(2):p. 366-372. |
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| Web URL(s): http://www.bioone.org/doi/pdf/10.1614/0890-037X%282003%29017%5B0366%3ACSBAFV%5D2.0.CO%3B2 Last checked: 12/13/2017 Requires: PDF Reader Access conditions: Item is within a limited-access website http://www.bioone.org/doi/full/10.1614/0890-037X%282003%29017%5B0366%3ACSBAFV%5D2.0.CO%3B2 Last checked: 12/13/2017 Requires: PDF Reader Access conditions: Item is within a limited-access website |
| MSU catalog number: SB 610 .W44 |
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