Well I use amdro mostly. Takes a few days but it gets the hill. If I need a quick knockdown I use an ortho or Bayer dust. However for a deep kill you need a bait like Amdro.
Today I harvested a bunch of worms. My tree was loaded but they were not that big. My neighbor has a tree about 20 ft tall that was fully leafed out yesterday and most of the leaves are stripped today. It has some very big orms on it. I picked a bunch of them (with his permission) and some of mine. Hopefully this will be the start of us having worms every year.. I plan on starting more trees so my grandsons can fish with them.