Veteran Advisor
Posts: 1,558
Registered: ‎10-18-2016

New Fungicides Better

Iowa State did some state-wide tests and found the newer fungicides were decidedly better against gray leaf spot than older products.


"All fungicides were effective against gray leaf spot. The newer chemistries appeared superior to older chemistries especially when disease was severe. Applications made at tasseling were more effective than those made earlier in the growing season. "


"Two treatments consistently reduced GLS severity more than all other treatments evaluated at all four locations: Miravis Neo applied at VT-R1 and Revysol premix applied at VT-R1. Disease was reduced more than 90 percent compared to the non-sprayed control. "