Ants in your strawberry patch can be very destructive. I don't mind a few taking on a snack but when over half of the strawberries I picked had large ant holes then it was time to take action. My harvest had gone from 3 pounds of strawberries a day down to maybe a pound and one-half.
I found that I could add about 2 cups of soap water to every two gallons of rain water for a great pest solution. I then went into my strawberry patch in the morning and started to pick my berries. Every time I was a berry covered or bitten by ant I gave the plant a douse of soap water. I took about 8 gallons of soap solution to finish the patch.