Some tips for non-toxic pest control, from Home Enlightenment & Better Basics for the Home by Annie Berthold-Bond
2 Tbsp liquid peppermint castille soap
1 gallon water
Spray around baseboards and countertop edges as a deterrant to flies, ants, fleas and mice.
Crush an Vitamin D pill and mix with cheese or peanut butter. Lethally disrupts rodents' calcium metabolism. Keep it out of areas that will be visited by children or pets.
Homemade Nontoxic Fly Strip
Cut a brown paper bag in 2 inch wide strips. Mix 1/4 c. corn syrup with 1/2 c. sugar and spread the mixture on the strips.
1 c. borax
1 c. sugar water
Pour mixture into small jars filled with loose wads of toilet paper - punch holes and put where ants are.
Pour 1/2 c. beer in saucer. Sweep them up.