I was a USAF munitions specialist 1965-69, we called any bomb with a fuse extension on it a "daisy cutter", from a 250 lb bomb right up to the 15,000 lb BLU-82.
The function of the fuse extension, along with a quick acting fuse was to cause the bomb to detonate above ground, thus cutting daisys, or anything else at ground level. They were very much more effective when used with pop out tail fins (snake eyes) that retarded the fall of the bomb. That allowed a large bomb ( but not the BLU-82) to be dropped accurately at low level, but give the aircraft enough time to be out of the blast radius of it's own dropped bomb.
I've seen the fuse extensions on 250, 500, 750, and 2000 lb bombs, we called them all daisy cutters, The BLU-82 was THE daisy cutter.