sulfentrazone + carfentrazone-ethyl (Zeus Prime XC)

Sulfentrazone (Zeus XC, Zeus Prime XC)
WSSA Group 14: protoporphyrinogen oxidase (PPO) inhibitor

A pre-emergence or early post-emergence herbicide for controlling several species of annual broadleaf weeds. If weeds are emerged, mix sulfentrazone with an approved post-emergence herbicide. Apply as a uniform broadcast soil application to vineyard floors or as a uniform band directed at the base of the vines then incorporate into the soil with rainfall or irrigation. Trunks can be wrapped in non-porous wraps, grow tubes, or wax container to protect against spray contact. Do not apply to vines younger than 3 years old. Activity of sulfentrazone increases dramatically under alkaline soil conditions or when irrigated with alkaline water. The pH of the spray solution should be between 5 and 9. If applied after bloom, use a shielded sprayer to avoid movement of spray mist to flowers. Sulfentrazone should not be applied to soils that are susceptible to dispersal by wind. Do not apply to frozen soils. Do not apply more than 12 oz of Zeus XC per broadcast acre per 12-month period. A prepackaged mix of sulfentrazone + carfentrazone-ethyl (Zeus Prime XC) is also available for grapes established at least 2 years.

No weed species are resistant to this mode of action documented to occur in ID, OR, or WA; data from Heap, I.
The International Survey of Herbicide Resistant Weeds. Available at www.weedscience.org

Usage for sulfentrazone + carfentrazone-ethyl on Grapes

Pre-Emergence (Weeds)

Post-Emergence (Weeds)