| Autor: |
Bonnar, David J., Eichler, Jeff P., Parikh, Sanjai J., Blandino, Andrew, Lybrand, Rebecca A., Morris, Madison L., Hengel, Matt J., Tjeerdema, Ronald S. |
| Zdroj: |
ACS Agricultural Science & Technology; December 2023, Vol. 3 Issue: 12 p1169-1176, 8p |
| Abstrakt: |
The herbicide oxyfluorfen [OXY; 2-chloro-1-(3-ethoxy-4-nitrophenoxy)-4-(trifluoromethyl)benzene] has recently surged in interest among rice farmers with the development of OXY-tolerant rice and its demonstrated effectiveness against problematic rice weeds in California. Not currently registered for use with rice, its fate in rice fields is poorly understood. Using a batch equilibrium method, we characterize the soil-water partitioning behavior of OXY under simulated California rice field conditions. Sorption data imply strong, primarily concentration-independent binding correlated with soil organic carbon (log[Koc] 4.79–5.19; N0.87–1.08) across all soil, temperature, and salinity treatments. Temperature significantly enhanced binding affinity for sorption and desorption processes (P< 0.01). Bound OXY was poorly desorbed (9.3 to 27.0% desorption) from rice soils and exhibited significant sorption hysteresis (HI > 0) in all treatments. These results indicate that OXY will predominantly remain in soil and will be resistant to release into water in California rice fields. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
