[BBuster]

This I can assure you works well because I do it every couple years when the population grows.

Take a large plastic trash can, like one of the “Brute” cans and put in about a foot of water.

Smear peanut butter around the perimeter about 10 inches or so down from the top on the inside.

Run some Vaseline on the rim. ( not essential but doesn’t hurt)

Set in “ squirrel territory”

They can’t swim.

They also can’t sit on the rim and reach the peanut butter without falling in.

Bury near fruit trees.

Sometimes the tree rat has to get whacked.