The Environmental Protection Agency granted federal registration under Section 3 of the Federal Insecticide, Fungicide and Rodenticide Act (FIFRA) to Syngenta for its Trefinti nematicide/fungicide. State registrations are actively being pursued and are anticipated to be available soon.
Powered by TYMIRIUM technology, Trefiniti selectively reduces nematode populations and controls soilborne diseases on greens, tees and fairways to help achieve robust root growth. The new product controls key plant-parasitic nematode species, including sting, lance, root-knot and Anguina. It is also the only nematicide labeled to control fungal diseases, including spring dead spot, take-all root rot and mini ring.
“While light sandy soils have historically been conducive to nematode issues, nematodes can be found in all soil types,” said Lane Tredway, Ph.D., technical services manager for turf at Syngenta. “Over the past decade, we have conducted extensive testing to address this growing issue for turfgrass managers. The sustained R&D investment has led to Trefinti, a groundbreaking solution for controlling elusive, damaging nematodes that also offers powerful control of root diseases.”
To enhance nematode control and reduce the risk of resistance, Syngenta recommends rotating Trefinti and Divanem nematicide, particularly in areas with high nematode populations or substantial damage. A rotation with Divanem provides broader-spectrum control of key nematode species, including spiral and stubby root, as well as resistance management for sting and root-knot species. Trefinti can be applied as a broadcast spray or spot treatment.
“Trefinti delivers what superintendents have been asking for — broader-spectrum nematode control including lance, plus the added benefit of soilborne disease protection in one solution,” Syngenta turf market manager Stephanie Schwenke said. “We’re excited to bring Trefinti to turfgrass professionals who need enhanced nematode and disease control as state registrations are completed over the coming weeks. We anticipate product availability in January to support our customers’ needs.”
Joseph Roberts, Ph.D., Clemson University
Treatments applied July 2, July 30, Aug. 27 and Sept. 24, 2024. Watered-in immediately with 1/8” of irrigation. Photos taken May 15, 2025.
