Clump-forming winter or summer annual. The leaves are smooth and abruptly contracted at the apices to give a characteristic 'boat-shaped tip'. The seeds ripen and are deposited 8 months of the year.
The inflorescence (flowering structure) is a terminal spreading panicle that varies between 1 and 4 inches in length. Propagation: It is tetraploid ... 1990. Collar: Cool, moist conditions; compacted soil; close mowing; high levels of nitrogen. Large membranous Growth Habit: Annual bluegrass grows well in moist areas in full sun. Leaves have linear margins (sides parallel) and distinctive boat-shaped tips. Annual bluegrass, in the family Poaceae, is a winter annual, clump-forming grass with a yellow-green color, prow-shaped leaf tips, and a distinctive whitish flower head. For more information and images please visit State rules and regulations and special pesticide use allowances may vary from state to state: contact your State Department of Agriculture for the rules, regulations and allowances applicable in your state and locality. Preferring moist, shady areas, it emerges from fall through spring, flowers, and then dies with the onset of warm weather. The information herein is supplied with the understanding that no discrimination is intended and that listing of commercial products, necessary to this guide, implies no endorsement by the authors or the Extension Services of Nebraska, Colorado, Wyoming or Montana.
Avoid overwatering and applying too much nitrogen fertilizer. Weed Links Life cycle: It is in flower all year around except for severe winters. Conditions that favor growth. IPM Bugwood. P. annua is native to temperate areas of Eurasia. Pest Sampling and Management Tactics
Fibrous Livestock In Alfalfa apply before annual blue grass reaches 3 inches in height. General Chapters — IPM for Woody Ornamentals IDENTIFICATION AND LIFE CYCLE. The root system is fairly shallow and weak, requiring moisture from rain or frequent irrigation. Absent It can be a difficult weed to control, as each plant produces several hundred seeds in a season that can lay dormant years before sprouting. It is listed as a weed in 38 crops in more than 80 countries within and outside its native distribution range. Leaves.
Seedhead Color: The ligule is membranous and rounded. Integrated Pest Management Annual blue grass going to seed.
Penn State Hotlines
For a complete list of reports of herbicide resistance in annual bluegrass globally please see http://www.weedscience.org/Summary/USpeciesCountry.asp?lstWeedID=130&FmCommonName=Go. Read our Commitment to Diversity | Read our Privacy Statement. While the two types aren’t easy to distinguish from each other, the annual type is more upright in its growth habit and produces more seed than the lower-growing perennial type. Annual bluegrass (Poa annua) is a low growing cool-season grass in the family Poaceae. reptans. Origin of Poa annua L. Nature, 169:160. The spikelets are stalked, awnless, 1 to 2 cm (3/8 to 3/4 in.) Poa annua L. Poaceae (Grass family) Life cycle. The annual type also tends to … Ligule. It is usually quite small, consisting of a low tuft of vegetation about 4" across and 1½" tall. Life cycle. Calibration http://oregonstate.edu/weeds/. The ligule is membranous and rounded. Disease Management Stems.
This species has the potential to outcompete other plants and crops. The inflorescence (flowering structure) is a terminal spreading panicle … It can be found from the Arctic to the Antarctic regions in practically all terrestrial ecosystems. Annual bluegrass is a misnomer because there are two plant types of annual bluegrass—a true annual, P. annua var. and Marjolein Schat, Montana State University from the following sources: http://www.weedalert.com/weed_pages/wa_annual_bluegrass.htm, http://www.ppws.vt.edu/scott/weed_id/poaan.htm, http://ohioline.osu.edu/srt-fact/0003.html, http://www.msuturfweeds.net/details/_/annual_bluegrass_47/, http://www.ipm.ucdavis.edu/PMG/PESTNOTES/pn7464.html, Pacific Northwest Weed Management Handbook at http://weeds.ippc.orst.edu/pnw/weeds Accessibility Screen reader support enabled. Annual bluegrass seeds begin to germinate in late summer or fall as soil temperatures drop below 70°F.
Cooperative Extension, which staffs local offices in all 100 counties and with the Eastern Band of Cherokee Indians. It tolerates the short mowing heights - forming seed heads that disrupt the uniformity and the ball roll of golf course greens. Reproduction. High Plains IPMHPIPM Seed Ligule: However, substantially larger plants are sometimes observed. Poa is one of the most common weeds of highly maintained turfgrasses - sports fields and golf courses - giving golf course superintendents headaches when it invades their greens. Vernation: Narrow, smooth