Always read and follow all label directions. Cogongrass is an invasive species commonly found in pastures that is not going to go away on its own. Experts say it could spread to the north and west in the future. Deep plowing may be effective in the removal of cogongrass if the plow reaches up to 6 inches deep. It is steadily marching through Alabama and into neighboring states. Glyphosate is not a product name but is the active ingredient found in the herbicide and there are numerous glyphosate products available. Systemic herbicides tend to act more slowly than contact herbicides. Cogon grass can be kept in control, by keeping it short, like other grass. Habitat requires the use of a spray adjutant when applying on post-emergent vegetation. It costs millions each year to control in Florida¹. In open fields and forests cogongrass initially forms circular infestations that appear light green in summer and light brown in winter as can be viewed in these oblique aerial photographs. One danger with any chemical control method is the chance of an oxygen depletion after the treatment caused by the decomposition of the dead plant material. CAUTION: glyphosate herbicide spray mixtures should be considered non-selective when sprayed … During this time nearly all available herbicides have been tested, but few effective products have been found. 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. Repeated applications each year for several years are ne… They are used with permission. Habitat of cogon grass. At this time, there are no known biological controls for cogongrass. They are broad spectrum, systemic herbicides. Photo Credits: The majority of the aquatic plant line drawings are the copyright of the University of Florida Center for Aquatic Plants (Gainsville). While it is not illegal to possess this plant in Texas, it should not be introduced into new water bodies and should be treated with herbicide when present. Based on lif… Cogongrass (Imperata cylindrica) is a significant invasive threat in Alabama and throughout the southeastern United States. Many of the cogongrass “hot spots” are concentrated in south Mississippi, state forestry officials said. Recently, surveys in Asia an East Africa for potential biological control agents, identified several insect herbivores , including several genera of stem borers and gall-forming midges, that show some promise. Manual Control 1 Till the soil in the spring to a depth of at least 6 inches in order to kill the plant's underground rhizomes. Deep plowing may be effective in the removal of cogongrass if the plow reaches up to 6 i… In order to completely remove this plant, the rhizomes must be destroyed. State forestry officials are warning of an invasive weed that chokes out native plants. If left uncontrolled, thick thistle stands can reduce grazing, result in less forage production, and ultimately, lower calf weaning weight. Cogon grass rhizomes exhibit apical dominance (English, 1998), which may be an important factor both in limiting the local spread of cogon grass via rhizomes (Wilcut et al., 1988a), and reducing the efficacy of herbicidal control due to sub-lethal herbicide sink activity in … To assist you with these determinations see SRAC #103 Calculating Area and Volume of Ponds and Tanks. 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