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FEATURED WEED
Annual Bluegrass
Poa annua
WEED DESCRIPTION
Poa annua, also known as annual bluegrass, can be difficult to control if not properly managed. It tolerates low mowing and germination occurs in late summer and early fall, especially under cool, moist conditions. This weed grows erect and forms a tight clump, with light green, narrow leaf blades with boat-shaped tips. It is most commonly found in turf, landscapes and gardens and can sometimes be mistaken for Kentucky bluegrass. Once soil temperatures fall below 70 degrees, germination of Poa annua will begin.
CONTROL TIPS
Annual bluegrass produces most of its seedheads in spring, but early fall is the time that it germinates in most turf and landscape situations. Apply a preemergent herbicide, such as Dimension® specialty herbicide, this fall to get ahead of those seedlings and control early season crabgrass and other annual grassy and broadleaf weeds at the same time. To maximize your control and minimize callbacks, develop a dense, healthy turf to reduce sunlight at the soil surface. Keep soil phosphorus levels in the low to medium range. Last but not least, cultural practices can help reduce Poa annua, but herbicides are needed for superior control.
FOR MORE INFORMATION: Visit the Weed Watch Digital Edition.
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