It has been one year since the turf conversion and overall it has been successful. Keeping the Poa annua and other weed grasses from coming back is impossible, however maintaining an acceptable population is a reasonable goal.
The control of the Poa began as soon as the new seed emerged last year and now just 2 weeks ago the first fall application of an herbicide called prograss was made throughout the course. Prograss had been applied last spring, so this is not the first use on the new turf.
|Poa December 2012 between the tree line|
The most successful strategy at our disposal for controlling annual bluegrass is consecutive applications of prograss. These applications are spaced 21 days apart and are done in the spring and the fall. No more than 5 applications can be done in a year so the number that are done consecutively are dependent upon weather conditions and how effective each application is.
|Off color Poa annua 10 days after prograss|
Our first application which was made October 28th was quite effective as you can seed from the photo. The decision to do another application was rather easy to make based on the first applications effectiveness and the dry mild weather we have been having. This second application will be done Monday, November 18th, and its effectiveness will be evaluated before making another application. Based on the time of year it is doubtful that a third application will be done in 2013, and if that is the case the next applications will be done in March.