Salt can hurt or kill frogs. Similar to slugs, frogs have extremely moist skin, therefore contact with salt or a saltwater solution generates a burning sensation.
An excessive amount of salt drains water from the cells of an animal and destroys its internal homeostasis, resulting in severe dehydration. Frogs that become dehydrated perish. Even if you spray a saltwater solution on the pavement or plants near your home, the frogs’ feet and legs will be burned if they come in contact with the area. Although there are various ways to eliminate frogs, salt is an efficient method.