poa annua

fi******@*ol.com – posted 04 March 2003 22:26

I live between Olympia and Tacoma Washington and I have a huge problem with poa annua. I killed an acre of lawn 4-times with round up brought in new topsoil and re-seeded with sr4200 perennial rye grass. I mow at approx 3/4-1/2″ and it is now more invasive than before I replanted my soil can be very wet in winter and spring but the new soil brought in is 70% sand/ Can I rid my golf course like lawn of poa and with what chemicals or what measures to take to make this stuff go away!?

frenchman – posted 05 March 2003 21:15

I just sprayed my fairways and tee boxes with round-up to kill the poa annua. Tran-xit will kill the poa while the grass is out of dormant, but right now you can spray your yard with round up with your yard being in dormant and it won’t kill the grass, but don’t wait to much longer. Also by spraying round-up it will hold the grass back longer of coming out of dormant, but this will prevent winter kill.

cm********@***rr.com – posted 08 September 2004 18:49

How can I get rid of poa annua in kentucky blue grass sod. (without roundup) I live in Wisconsin and run a lawn service company and would like to have answers for my cusomers. Dan

cohiba – posted 08 September 2004 19:11

Dan, We can use Velocity(a new herbicide) in NJ for fairways and bentgrass putting greens. I’m told its GRRREAT. Will be trying it later this month. Check the Label for your state. Have you tried Prograss? Some guys swear by it, others have limited success. Another thing that has been tried is preemergence in fall, prior to the winter emergence of the new Poa annua. Another thing we try is Primo (Plant growth regulator) in spring at the start of seed head production time. still other guys use wetting agents in spring to “burn off” the sensitive seed heads. Most home owners would not be able to tell the difference between poa and ryegrass without the seed heads. Still others would not be able to tell the difference between dandelion and ryegrass without the flower. When someone comes out with a herbicide that kills poa, can be sold in stores for home owners and is safe for the environment, they would make a fortune.

I wonder if cornmeal would work?????

Take Care and Keep it Green….

ted – posted 08 September 2004 21:02

great answers, as usual. you can also use rubigan, a fungicide, believe it or not.

cohiba – posted 09 September 2004 18:45

Ted,

My god, I haven’t thought of Rubigan in years. Haven’t used it in about nine years either. Didn’t a disease grow resistance to Rubigan? Was it $pot or Brown patch? Anyway, I read the label for NJ use of Velocity, extremly limited use. Cannot wait to try it next week. Chemicals rule.

Take care…..

ted – posted 09 September 2004 21:11

yeah, some doctorate type guys at purdue mentioned it as a fungicide in one of their seminars- never used it however.