can you use gloves and cut it.....pour full strenth vinegar in the hole ...keep doing that for several days................it will die......put a heavy rock over it for the winter to keep any light getting thru to let it live again. the grass around it will die off for a short while but if you use an old pointed tip container like a squirt bottle to control the vinegar than less of the grass will die.....this is the safest thing to use.....won't hurt children or pets. When it dies off for the winter.....see if you can dig up the roots......then heavy vinegar, I saw a stronger dose of vinegar at Walmart 6% cleaning vinegar.