Here is an article on controlling Field Sandburs, (aka grass burs) by James A. McAfee, PhD, an associate professor with Texas A&M. We’ve all probably dealt with these stickers and/or continue to deal with them. We find them in the most interesting places inside the house, freshly washed and dried bath towels, socks, carpet and rugs, etc. Our Beagle finds them whenever she wanders around the pastures and open spaces around the house. She patiently waits until we come along to remove them from her pads. Hope this article is of benefit to you. FYI we will be using XL 2 g pre-emergent herbicide. The article provides a list of several other choices. Good Luck!