AMVAC 13561 SUREPYC Herbicide Quart. For rapid sedge control in turfgrass, look no farther than SUREPYC® herbicide. Formulated with Sulfentrazone, SUREPYC attacks yellow nutsedge and green kyllinga with symptoms visible in 4 days or less. SUREPYC is absorbed by the leaves and roots of target weeds. These dual modes of uptake enhance control and reduce the need for costly retreatment.