5/22/2016 3:05 PM
I have been mixing Primo or other maker's trinexepac-ethyl in the routine fungicide+ mixes on greens since it was introduced in the late 1980's or early 90's. All on bent and bent/poa greens.
Almost all mixes have a systemic, including some DMI products, a contact fungicide and an adjuvant. Most tanks include a blend of foliar and root absorbed nutritionals. Some tanks have Quicksilver to knock back moss as needed. In our situation, with little amounts of poa on the greens, I also include a paclobutrazol.
I say I because I am the greens applicator and have been for 28 years. I am also the tee and approach applicator. I spray every 2 weeks and don't have time to ride the sprayer much more than that. This has been my routine and there has never been an issue. Some don't like to mix that many products together and will split them and send the sprayer out more often.
Last week I had a propiconizol at 1 oz/m, chlorthalonil wdg at 5 lb/a, trinexepac-ethyl at 7.5 oz/a, paclobutrazol at 7.5 oz/a, Quicksilver at 5 oz/a for the first time this season, 5 different nutritionals, an adjuvant, and a colorant.
The next application will have a different FRAC fungicide, fluxapyroxad, same growth regulators, same nutritionals, Quicksilver, adjuvant, and colorant.
Be sure to rotate FRAC fungicides to prevent resistance in the future.
The only issue I have seen with mixing trinexepac-ethyl and a DMI is increased growth regulation and increased green speed. If timed right before big events this gives a little extra ball roll for the event.
Chris Thuer, CGCS, Bear Slide Golf Club, Cicero, IN