KF BioTrigger for Perennial Forage and Turf is the latest offering in the SabrEx® family of products from ABM®. It’s a dry biological seed treatment that is easy to use and is compatible with many common seed treatments. KF BioTrigger for Perennial Grasses & Turf containstwo biological fungi strains called Trichoderma. Trichoderma colonizes with the plants root system and develops a symbiotic relationship with the plant. The Trichoderma feed from the starches and sugars produced by the plant.