What kills sandspurs?
There are a few different ways you can kill sandspurs. One way is by digging them up and the other is by using borax. For more great tips visit http://www.howtogetridofstuff.com/outdoor/how-to-get-rid-of-sandspurs/.
Intense heat can kill off sandspurs in an area. The chemical borax has also been known to eliminate these pesky weeds. These two elimination methods kill off other plantlife in the area along with the sandspurs.