For newer patches, tillage can eliminate cogongrass from an area if continued during the course of a growing season. For more information on cogongrass identification, please see: www.cogongrass.org/identification Gainesville, Florida, USA: University of Florida, 165 pp. Cogongrass.org. Cogongrass Identification. The flowers are silky panicles, 1 to 8 inches long appearing from February to May. Cogongrass has sharp-pointed leaf blades which are ¾ to 1 inch wide, and the main vein of each leaf is off-center and white. Cogongrass control varies according to the age and rhizome mat density and depth. Native to Southeast Asia, cogongrass is an aggressive invasive plant that that has spread to all continents except Antarctica (MacDonald 2004) and is considered among the worst problematic weeds on a global scale (Holm et al. UGA Thomas Co. Extension, 2010 R.J. Byrne and D.J. Cogongrass will rarely be eradicated with one application, even when using high rates or tank-mix combinations of glyphosate and imazapyr. Imperata cylindrica, also known as cogongrass, is ranked as one of the 10 worst weeds in the world. cogon grass. Images left to right: Off center Midrib of Leaf Needle-life Rhizomes Cogongrass Flower – Blooms occurs between March and May Flowering cogongrass on roadside Cogongrass overtaking pines . Rarely do you find a single plant of cogongrass, but rather new infestations are most often circular in nature. Leaves. Websites. Field Guide to the Identification of Cogongrass. Designed by Elegant Themes | Powered by WordPress, Judy Biss is the Agriculture and Natural Resource Agent in Calhoun County, Florida, Maintaining Dissolved Oxygen Levels in Your Pond to Reduce Fish Kills, The Bumble Bee – One of Florida’s Vital Pollinators, 2017-2018 Bee Informed Partnership’s National Bee Colony Loss Report, UF/IFAS Animal Science Offering Know Your Heifer Program, Texas A&M Offers QuickBooks Desktop Training for Farmers and Ranchers Online in 2020. Key Identification Features of Cogongrass Flower/Seed head. Foliage Leaves have an off-center, whitish midrib and finely serrated margins. Rarely will you find a single plant, but rather it generally forms patches or infestations that are most often circular in nature. kunai. Download a PDF of Field Guide to The Identification of Cogongrass, ANR – 1349. santintail . Without control measures cogongrass will readily displace native or cultivated vegetation. Skip navigation Sign in. P.O. Cogongrass is one of the world's worst invasive weeds, and is firmly established in several southeastern states. It is frequently sold across the U.S. in plant nurseries and is widely available over the Internet for ornamental use. For more information of cogongrass ecology and control, visit www.cogongrass.org. Ligules hairs 0.2-3.5 mm. Cogongrass is one of the 7 most invasive weeds in the world. Cogongrass is an exotic plant species from Asia that has aggressively expanded its range in the Southeastern United States and is difficult to control. Imperata cylindrica (commonly known as cogongrass / k oʊ ˈ ɡ oʊ n / or kunai grass / ˈ k uː n aɪ /)) is a species of perennial rhizomatous grass native to tropical and subtropical Asia, Micronesia, Melanesia, Australia, Africa, and southern Europe. Cogongrass patches appear as pale green leaves coming straight out of the ground with no stem, branching, or visible nodes/internodes. on peat. It is extremely hard to get rid of once you have it. Identification and Biology of Non-native Plants in Florida’s Natural Areas. About Cogongrass. Watch … CogonGrass, Imperata Cylindrica. Each seed has silky-white hairs that aid in wind-blown dissemination. Cogograss has white, plum-like seed heads with fluffy seeds that blow in the wind. Inflorescence a cylindrical cottony or feathery spike. More. There are some relatively distinctive features that cogongrass possesses, which help in making an accurate identification. Flowering typically occurs in spring or after disturbance of the sward (mowing, etc.). Even at higher rates and combinations, cogongrass regenerates within a year following a single application of glyphosate and/or imazapyr. cogon grass Taxonomic Tree; Domain: Eukaryota Kingdom: Plantae Phylum: Spermatophyta ... Burks KC, 1998. Cogon grass (Imperata cylindrica) is an invasive, non-native grass which occurs in Florida and several other southeastern states.A pest in 73 countries, and considered to be one of the "Top 10 Worst Weeds in the World", cogon grass affects pine productivity and survival, wildlife habitat, recreation, native plants, fire behavior, site management costs and more. A minimum of two applications are needed, realizing that older infestations may require two to three years of treatment to eliminate rhizomes. Center for Invasive Species and Ecosystem Health, 2-8 inches in length (total flower or seed head), Blooms from late March to mid June (flower timing depends somewhat on local climate), Whitish, prominent midrib, that is often off center, Some leaves are very erect, but some may droop or lie flat, Could have a reddish cast in fall/winter or brown after frost or freeze, Leaves appear to arise directly from or close to the ground, Overlapping sheaths give a rounded appearance to the plant base, All vegetation doesn't arise from one dense clump, instead the plants are more spread out, Light-green to yellowish in color, or could be reddish, Leaf sheaths overlapping, giving the plant a round appearance, Hairy (the ligule is the most hairy part of the plant, the plant base may also be somewhat hairy), Tall grass (up to six feet, averaging 3-4 feet), Plants often turn brown in winter (at least partially, but may depend on local climate). The leaves originate directly from ground level and range from one to four feet in length. This partnership brings all the stakeholders together to eliminate this destructive weed." Perform additional tillage with a disk harrow or other appropriate implement every 6 to 8 … COGONGRASS – Imperata cylindrica Perennial, rhizomatous to 2-meters tall. 1977). The stem is moderately stout. Forms dense stands in mostly upland habitats. As with all pesticides, always read and follow label directions. Individual leaf blades are flat and serrated, with an off-center prominent white midrib (Figure 2). )is a warm-season perennial grass species found throughout tropical and sub-tropical regions of the world (Hubbard 1944). Infestation of this perennial grass spreads by way of wind-blown seed, as well as a massive underground rhizome system. Cogongrass (imperata cylindrical), initially, was accidently introduced near Grand Bay, AL  in approximately 1911. Cogongrass is a perennial grass that varies greatly in appearance. Cogongrass (Imperata cylindrica) is an aggressive invader of natural and disturbed areas throughout the Southeast. Appearance Imperata cylindrica is a perennial, colony-forming grass which can grow up to 6 ft. (1.8 m) tall. Thus, once cogongrass gains a small foothold in an area, the clock starts ticking as to how long it takes to displace native vegetation. Cogongrass (Imperata cylindrica (L.) Beauv. No need to register, buy now! Identification: Cogongrass is an aggressive perennial grass reaching 1 to 5 feet in height. Cogongrass is everyone's problem. Moorhead. Mapping, Control, and Revegetation of Cogongrass Infestations on Alabama Right-of-Way. Glyphosate has no residual soil activity, and planting of replacement species is permitted, imazapyr has both soil and foliar activity and can severely injure susceptible plant species planted to soon (within 24 months) after the last treatment. 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