If you mean that stuff called sticker-burrs. Try a potato sac an put some rocks in the bottom. Drag it around the yard an the burrs stick to it. Remember though you ll have to treat it so they don't come back. It's called pre emergent herbicide. Go to lowes or Home Depot - or a garden center
Thistle plants? There are several herbicides specifically designed for them. Since you are calling them "stickers," make sure you have it properily identified before you start using anything. Check with your local Ag Extension office.