Make your own organic bug spray from onion peels
Chop up an onion – skins and all – cover with warm water, and soak, covered, for 1 week. Strain the onion bits out and transfer the onion water in spray bottles. (You can bury the onion bits around plants that are prone to aphids, spiders and other pests.)
Spray garden plants with the water to fight pests and bugs.
(*You can also mix your garlic trimmings in with the onion pieces, bugs hate garlic too!*)