To kill ants with home remedies you can use baking soda and sugar or even bakers yeast.
To kill ants using the home remedy of baking soda and sugar take equal parts of baking soda and equal parts of sugar and mix them together and put the baking soda and sugar ant bait in something such as a coffee container lid or other flat container that the ants will be able to get at easily.
The sugar will be what attracts the ants to the bait and the baking soda will be what actually kills the ants.
You can also just put some bakers yeast where the ant hills are and when the ants eat the bakers yeast it will kill the ants by swelling their insides out.