Contains s-metolachlor, the active ingredient used in Pennant Magnum®
Get ahead of weeds before they invade. SpiruS™, a selective pre-emergence herbicide, controls many annual grasses, certain annual broadleaf weeds, and yellow nutsedge. SpiruS can be used on commercial and residential warm-season turfgrass, nurseries, sod farms, and other noncropland. The active ingredient, S-metolachlor, is shoot-absorbed and does not negatively affect turfgrass roots.
Product PDF Downloads
State Registry
Registered
For inquiries about product availability in your state, please contact Atticus.
Product PDF Downloads
- Product Brochure
- Packaging Info
- Safety Data Sheet
- Label
- ETIQUETAS EN ESPAÑOL
Safety Data Sheets
States Covered
Labels
States Covered
Etiquetas en Español
Specimen
SDS
Product Information Table
EPA Registration Number
91234-188
Active Ingredient
S-metolachlor 83.7%
HRAC Number
15
Signal Word
Caution
Formulation
Emulsifiable Concentrate
Package Size
4 x 1 gal,
30 gal,
Restricted Use
No
Key Benefits
- Effective on a wide range of warm-season turfgrasses, including bermudagrass, St. Augustinegrass, zoysiagrass, and more
- The only active ingredient labeled for nutsedge in ornamentals plants that can be applied over-the-top
- Safe to use on a broad range of ornamental plants in field, container, and landscape settings
Market Segments
The following represent the most common uses for this product. For more detail about these or other uses please refer to the product brochure or ask your distributor.
©2025 Atticus. Important: Always read and follow label instructions. Not all products are registered for use in every state. SpiruS™ is not manufactured, or distributed by Syngenta Crop Protection, LLC, seller of Pennant Magnum®. Pennant Magnum® is a registered trademark of a Syngenta Group Company. SpiruS™ is a trademark of Atticus, LLC.