Use Crushed Eggshells
One amazing way to protect your plants from pests is by sprinkling crushed eggshells at the base. They act as a good fertilizer. When you till these eggshells into the soil it provides calcium to your plants, which is essential in building cell walls. And it also aerates the soil while reducing its acidity. For other tips and tricks using eggshells and egg cartons check this article about egg carton seedlings.