![]() Augustinegrass and centipedegrass lawns, atrazine is recommended. For postemergence control of chamberbitter in St. Postemergence Herbicides: Postemergence herbicides are most effective when applied to young weeds. Do not apply isoxaben to a newly seeded lawn until it has been mowed 3 times. ![]() Do not seed or overseed within 60 days after application. Wait 2 days after spray application and activate the isoxaben residual barrier by watering the lawn with ¼ to ½ inch of irrigation. To prevent new seeds from growing, the entire area to be protected must be sprayed. The isoxaben portion will aid in preventing reinfestation of the area from seeds that may be present. With this product, the postemergence, three-way, broadleaf weed control portion controls existing chamberbitter plants. Isoxaben is also available as an additional active ingredient in one Bayer Advanced brand three-way herbicide. Make the first application in late spring and the second about 8 weeks later. ![]() For home lawn use, it is purchased in a granular form, and the granules must be watered-in to allow the isoxaben to coat the soil surface for weed prevention. Augustinegrass, bermudagrass, and zoysiagrass lawns. Isoxaben is a preemergence herbicide that is effective for chamberbitter control in tall fescue, centipedegrass, St. Target areas where chamberbitter was observed the previous season and be careful to not apply near the roots of desirable landscape plants. Because chamberbitter tends to germinate in late spring and early summer (once the soil temperature reaches 70 ☏), applications after grasses fully green up are effective. Be careful not to apply on turf during the transition period from dormancy to active growth (spring green-up). They must be applied prior to seed germination.Ītrazine is effective for preemergence control of chamberbitter in centipedegrass and in St. However, they will not affect established weeds. Preemergence Herbicides: Because preemergence herbicides prevent seedlings from developing, they are an effective tool against annual weeds. Because chamberbitter seeds require light to germinate, this is especially effective. Within landscape beds, apply two to three inches of mulch in the spring to cover seeds from the previous season. For more information on watering, fertilizing, and mowing, see the following fact sheets: HGIC 1201, Fertilizing Lawns, HGIC 1205, Mowing Lawns, and HGIC 1207, Watering Lawns. A properly mowed turf that is not stressed by insects, diseases, drought, or nutrient imbalance is the best defense against weeds. Cultural ControlĬultural weed control is the prevention of weeds through proper lawn management practices. ![]() Preventing the weed from reaching maturity and setting seeds also reduces future weed populations. This is best accomplished by hand when weeds are young and small or in the seedling stage and easier if the soil is moist. Mechanical weed control involves the physical removal of the weed from the soil. Management of chamberbitter is best achieved through the integrated use of mechanical, cultural, and chemical methods. The leaves are arranged in two rows on the branchlets and are thin and oblong, with smooth margins, resembling a mimosa seedling. ![]() It reproduces by seeds, which are found in the green, warty-like fruit attached to the underside of each branchlet.Ĭhamberbitter grows upright and has a well-developed taproot. It is a warm-season, annual, broadleaf weed that emerges from warm soils beginning in early summer. Nancy Loewenstein, Auburn University, Ĭhamberbitter ( Phyllanthus urinaria) is also known as gripeweed, leafflower, or little mimosa. Chamberbitter ( Phyllanthus urinaria) resembles a mimosa seedling. ![]()
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