| |
| Web URL(s): | http://onlinelibrary.wiley.com/doi/10.1002/(SICI)1096-9063(199904)55:4<434::AID-PS909>3.0.CO;2-Z/epdf
Last checked: 10/07/2015
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
|---|
| Publication Type:
| Refereed |
|---|
| Author(s): | Li, Yuta;
Zimmerman, W T;
Gorman, M K;
Reiser, R W;
Fogiel, A J;
Haney, P E |
|---|
| Author Affiliation: | Li, Zimmerman, Reiser, Fogiel: DuPont Agricultural Products, Expermental Station, Wilmington, DE, USA; Gorman, Haney: ABC Laboratories, Inc, Columbia, MO, USA |
|---|
| Title: | Aerobic soil metabolism of metsulfuron-methyl |
|---|
| Source: | Pesticide Science. Vol. 55, No. 4, April 1999, p. 434-445. |
|---|
| Publishing Information: | London : for the Society of Chemical Industry by John Wiley & Sons |
|---|
| # of Pages: | 12 |
|---|
| Keywords: | TIC Keywords: Metsulfuron methyl; Metabolites; Degradation; Soil microorganisms
|
|---|
| Abstract/Contents: | A laboratory study was conducted to determine the degradation rates and identify major metabolites of the herbicide metsulfuron-methyl in sterile and non-sterile aerobic soils in the dark at 20°C. Both [phenyl-U-¹⁴C]- and [triazine-2-¹⁴C]metsulfuron-methyl were used. The soil was treated with [¹⁴C]metsulfuron-methyl (0.1 mg kg⁻¹) and incubated in flow-through systems for one year. The degradation rate constants, DT₅₀, and DT₉₀ were obtained based on the first-order and biphasic models. The DT₅₀ (time required for 50% of applied chemical to degrade) for metsulfuron-methyl, estimated using a biphasic model, was approximately 10 days (9-11 days, 95% confidence limits) in the non-sterile soil and 20 days (12-32 days, 95% confidence limits) in the sterile soil. One-year cumulative carbon dioxide accounted for approximately 48% and 23% of the applied radioactivity in the [phenyl-U-¹⁴C] and [triazine-2-¹⁴C]metsulfuron-methyl systems, respectively. Seven metabolites were identified by HPLC or LC/MS with synthetic standards. The degradation pathways included O-demethylation, cleavage of the sulfonylurea bridge, and triazine ring opening. The triazine ring-opened products were methyl 2-[[[[[[[(acetylamino)carbohyl]amino]carbonyl]amino]carbon< >yl]-amino]sulfonyl]benzoate in the sterile soil and methyl 2-[[[[[amino[(aminocarbonyl)imino]methyl] amino]carbonyl]amino]sulfonyl]benzoate in the non-sterile soil, indicating that different pathways were operable. |
|---|
| Language: | English |
|---|
| References: | 31 |
|---|
| Note: | Figures
Tables
Graphs |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Li, Y., W. T. Zimmerman, M. K. Gorman, R. W. Reiser, A. J. Fogiel, and P. E. Haney. 1999. Aerobic soil metabolism of metsulfuron-methyl. Pest Manage. Sci. 55(4):p. 434-445. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=59381 |
| If there are problems with this record, send us feedback about record 59381. |
| Choices for finding the above item: |
|---|
| Web URL(s):
http://onlinelibrary.wiley.com/doi/10.1002/(SICI)1096-9063(199904)55:4<434::AID-PS909>3.0.CO;2-Z/epdf
Last checked: 10/07/2015
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
| 
MSU catalog number: SB 951 .A1 P45 |
| Find from within TIC:
Digitally in TIC by record number. |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |
