Triario® WG
listings. Availability Triario WG is registered for sale in the following U.S. states and territories: AL, FL, GA, ID, IL, IN, IA, KY, MI, MS, NC, OH, OR, SC [...] of action of Triario® WG is based on the following mechanisms: Mycroparasitism: Triario® WG is capable of parasitizing plant pathogenic fungi. Competition: [...] Triario® WG Biological Fungicide becomes active in soil or on plants when temperatures are above 50 ºF and is not effective while temperatures remain cold