3/9/2014 10:03 AM
After making it through my first winter at a new course, I have encountered SU resistant Poa on the MiniVerde greens. Two applications of Revolver did absolutely nothing to the Poa, even when sprayed in warmer weather with some Ammonium Sulfate to help with uptake. We ended up have to pull all of the plants by hand which took forever and I would very much like to not repeat the endless hours of handpicking next year.
I have encountered SU resistant Poa on TifEagle greens before, and after much research ended up spraying Kerb @ 1lb/A every 60 days starting October 1 with great success. The only problem with that strategy at this course is that our fairways and approaches are overseeded with Ryegrass. Even with our minimal undulations, the Kerb will run into the Ryegrass and take it out.
Are there any options out there that will pre-emerge the Poa without harming the Ryegrass? Has anyone ever used Andersons Goose & Crab to pre-emerge Poa? I would think that the Oxadiazon component would control the Poa, but would be hesitant to apply it late in the fall when we cannot grow out of any potential herbicide injury. What if some activated charcoal was sprayed in the Ryegrass before the Kerb application to the greens? Would that counteract the movement of the Kerb?
A lot of questions I know, I just want to try and put together a game plan for this fall while it is all still fresh on my mind.
Thanks,