Annual bluegrass is a cool season annul that
reproduces by seeds and creeping stems that root at nodes. Annual
bluegrass forms fibrous roots, grows to 15 inches, and develops
stems that are prostrate to erect. It may root at lower nodes. The
stems and leaf sheaths are flattened and the sheaths are also overlapping.
Leaves of annual bluegrass are apple green, 1/2 to 3/4 inch long,
and 1/25 to 1/5 inch wide. They are flat, soft, and both the upper
and lower surfaces are smooth. The tip is boat-shaped. Flowers of
annual bluegrass are panicles, 1 to 3 1/2 inches long, open and
pyramidal. Annual bluegrass can flower at putting green heights.
Occurrence - Annual bluegrass occurs on wet, compacted
soils, and in cool temperatures. It responds to intense mowing and
fertility and lacks tolerance to temperature extremes.
Non-Chemical Control – To control annual
bluegrass without chemicals, maintain turf health and density through
proper culture. Avoid excessive watering and fertilization and compacted
soil conditions.
|
Chemical
Control - Apply preemergence herbicides before weed germination
in late summer or early autumn. Apply postemergence herbicides during
periods of active growth during cool, moist periods.
|
