Turfgrass Weed Control Database
The Turfgrass Weed Control Database contains the same information and pictures included in the Miscellaneous Publication MP-521. The weeds are arranged alphabetically by scientific name because common names vary and thus be inaccurate.
Annual Bluegrass, Poa annua
It is difficult to achieve complete control of annual bluegrass with a single pre or post herbicide application. Preemergence and postemergence treatment may be needed. To achieve preemergence control with herbicides such as indaziflam (Specticle), prodiamine, (Barricade) pendimethalin (Pendulum) and dithiopyr (Dimension), apply on August 15 and water in immediately. Specticle can be applied later because it has postemergence activity on small annual bluegrass. In bermudagrass, one of the cheapest and easiest ways to control Poa annua is to use glyphosate while bermudagrass is completely dormant. Revolver (foramsulfuron), TranXit (rimsulfuron) and Monument (trilfoxysulfuron) will provide postemergence Poa annua control without damaging partially green bermudagrass or zoysiagrass. Simazine and atrazine are effective preemergence and postemergence on annual bluegrass that has not tillered.