Answer: Sticker burrs (also called grass burrs!) are a result of a thin stand or sparseness of the grass-of-choice for your yard. Burrs cannot compete with a properly maintained bermuda turf or St. Augustine grass. When you mow the bermuda closely every 5 to 7 days or the St. Augustine as high as the mower blade can be set every 7 to 10 days, burr plants will not survive. It is only when adverse weather (dry) and poor culture diminish the desired grass growth do burrs get started. Of course, in new lawns burrs compete with the chosen turf until it is crowded out. Sticker burr eradication requires several methods of attack. BEFORE sticker burrs germinate and to keep them from germinating, use a pre-emergence herbicide such as Balan, Betasan or Portrait beginning in February, again in May and again in July. If grass burr plants emerge, mow the grass-of-choice at the appropriate height on a weekly basis before burr plants can produce and mature seed burrs. If small burrs are detected at mowing time, use a grass catcher to eliminate possible mature burrs. MSMA or DSMA herbicide can be used on bermuda grass turf ONLY to kill grass burr plants. Image can be used on both bermuda and St. Augustine to kill grass burr plants even though some stunting and/or yellowing may occur. Fertilize, mow and water to cause optimum growth of the chosen turf grass to crowd out the grass burr population.
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