The problem with poa

Every sports field has its particular problem weed that impairs playability and field aesthetics. For most, it's Poa annua.

One of the most common and widely distributed grassy weeds in the world, Poa annua is also one of the most difficult to control on turfgrass. Cool-season grasses provide conditions that are ideal for Poa annua growth, including high moisture, nitrogen, high traffic levels and routine fungicide use.1 There’s never been a real solution for eliminating Poa annua. Until now.


New chemistry. New strategy.
XONERATE 70 WDG (Amicarbazone) is a post-emergent herbicide that represents a new turfgrass chemistry for golf courses. XONERATE doesn’t just manage or suppress Poa annua, it eliminates it.

XONERATE contains 70 percent Amicarbazone in a water-dispersible granule formulation. It’s absorbed by leaves and roots and inhibits photosynthesis in sensitive plants by interfering with normal electron transport.

Cool-season turgrasses
XONERATE can be applied up to three times at a rate of 1 ounce/acre plus Tenacity® (mesotrione) 4 ounces/acre plus a surfactant for cool-season turf. It should be used on turf that has a smaller percentage of Poa annua (less than 10 percent Poa annua population), while transitioning to desirable turfgrass.2

Turf species acceptable for XONERATE
XONERATE should only be applied to sites that are composed of the following cool-season turfgrass3 species unless trial use has indicated that the turf species not listed here is tolerant to Amicarbazone DF. Apply to turfgrasses established for six months unless otherwise directed on this label. See the XONERATE label for use on specific turf species.

When applied as directed under the conditions described, established turfgrasses are tolerant to this product. Temporary yellowing of the turf may occur 14 to 21 days after application. This effect is temporary and the turf will recover in 14 to 21 days.  Fill-in of bare spots caused by removal of Poa annua may take longer. Cultural practices directed at encouraging the growth of  turfgrass will speed up the fill-in process.


1Grounds Maintenance, Controlling Poa annua in bent grass greens by Bert McCarty, Clemson University, December 22, 2011
2Rates and applications will vary by turf type and geography
3Cool-season turfgrass species have demonstrated acceptable tolerance to Amicarbazone 70DF. However, not all cultivars have been evaluated.