AUTHORITY XL
FMC Corporation
Authority® XL Herbicide, developed by FMC Corporation (EPA Registration Number: 279-3413), is a pre-emergent and burndown herbicide designed to provide broad-spectrum control of both winter and summer annual weeds in soybean crops. By combining two active ingredients—sulfentrazone and chlorimuron-ethyl—this herbicide offers two distinct modes of action, enhancing its effectiveness against a wide range of weed species.
EPA registration: 279-3413
Herbicide
Mode(s) of action:
Active ingredient(s): Chlorimuron; Sulfentrazone
**Authority® XL Herbicide**
Authority® XL Herbicide, developed by FMC Corporation (EPA Registration Number: 279-3413), is a pre-emergent and burndown herbicide designed to provide broad-spectrum control of both winter and summer annual weeds in soybean crops. By combining two active ingredients—sulfentrazone and chlorimuron-ethyl—this herbicide offers two distinct modes of action, enhancing its effectiveness against a wide range of weed species.
**Key Features:**
- **Dual Modes of Action:** Integrates Group 14 (PPO inhibitor) and Group 2 (ALS inhibitor) herbicides to effectively manage and reduce the selection pressure for glyphosate- and ALS-tolerant weed biotypes.
- **Broad-Spectrum Control:** Targets challenging weeds such as kochia, marestail, waterhemp, lambsquarters, and ragweed, ensuring cleaner fields and promoting optimal soybean growth.
- **Flexible Application Timing:** Suitable for both fall and spring applications, allowing for preplant, preplant incorporated, or preemergence treatments up to three days after planting. This flexibility aids in managing early weed pressure and facilitates timely planting.
- **Enhanced Crop Safety:** Formulated to provide excellent crop safety, minimizing the risk of adverse effects on soybean seedlings.
**Usage Recommendations:**
- **Application Rates:** For Roundup Ready® or LibertyLink® soybean systems, a reduced rate of 3.2 to 5.0 ounces per acre can be used as a foundation for burndown and residual weed control. For non-GMO soybeans and fields with glyphosate-resistant weed populations, a full rate ranging from 5.0 to 9.6 ounces per acre is recommended. Always refer to the product label for detailed use rates and instructions.
- **Tank Mix Compatibility:** Can be tank-mixed with other crop protection chemicals and liquid fertilizers to extend the spectrum of weed control and enhance burndown efficacy.
**Safety and Handling:**
- **Personal Protective Equipment (PPE):** Handlers should wear long-sleeved shirts, long pants, waterproof gloves, and shoes plus socks to ensure safety during application.
- **Restricted Entry Interval (REI):** A 12-hour REI is mandated following application, during which entry to treated areas should be restricted.
- **Environmental Considerations:** To prevent potential injury to adjacent sensitive crops or desirable vegetation, avoid applications under conditions that may lead to spray drift.
*Note:* Always read and adhere to the product label instructions and state regulations before use. Ensure compliance with all safety guidelines to protect both the applicator and the environment.
Authority® XL Herbicide, developed by FMC Corporation (EPA Registration Number: 279-3413), is a pre-emergent and burndown herbicide designed to provide broad-spectrum control of both winter and summer annual weeds in soybean crops. By combining two active ingredients—sulfentrazone and chlorimuron-ethyl—this herbicide offers two distinct modes of action, enhancing its effectiveness against a wide range of weed species.
**Key Features:**
- **Dual Modes of Action:** Integrates Group 14 (PPO inhibitor) and Group 2 (ALS inhibitor) herbicides to effectively manage and reduce the selection pressure for glyphosate- and ALS-tolerant weed biotypes.
- **Broad-Spectrum Control:** Targets challenging weeds such as kochia, marestail, waterhemp, lambsquarters, and ragweed, ensuring cleaner fields and promoting optimal soybean growth.
- **Flexible Application Timing:** Suitable for both fall and spring applications, allowing for preplant, preplant incorporated, or preemergence treatments up to three days after planting. This flexibility aids in managing early weed pressure and facilitates timely planting.
- **Enhanced Crop Safety:** Formulated to provide excellent crop safety, minimizing the risk of adverse effects on soybean seedlings.
**Usage Recommendations:**
- **Application Rates:** For Roundup Ready® or LibertyLink® soybean systems, a reduced rate of 3.2 to 5.0 ounces per acre can be used as a foundation for burndown and residual weed control. For non-GMO soybeans and fields with glyphosate-resistant weed populations, a full rate ranging from 5.0 to 9.6 ounces per acre is recommended. Always refer to the product label for detailed use rates and instructions.
- **Tank Mix Compatibility:** Can be tank-mixed with other crop protection chemicals and liquid fertilizers to extend the spectrum of weed control and enhance burndown efficacy.
**Safety and Handling:**
- **Personal Protective Equipment (PPE):** Handlers should wear long-sleeved shirts, long pants, waterproof gloves, and shoes plus socks to ensure safety during application.
- **Restricted Entry Interval (REI):** A 12-hour REI is mandated following application, during which entry to treated areas should be restricted.
- **Environmental Considerations:** To prevent potential injury to adjacent sensitive crops or desirable vegetation, avoid applications under conditions that may lead to spray drift.
*Note:* Always read and adhere to the product label instructions and state regulations before use. Ensure compliance with all safety guidelines to protect both the applicator and the environment.