Lime has also shown some effectiveness as a natural insecticide, since it causes insects to dry out and suffocate. Unfortunately, lime kills all insects, including beneficial ones, and it can also kill your plants if you use too much.

What insects does lime repel?

Hydrated lime is also called calcium hydroxide. This simple substance has been mixed with water and sprayed over plants as a basic pesticide for many years. It is known to repel aphids, flea beetles, Colorado potato beetles, squash bugs, cucumber bugs and other undesirable insects.

What is the best chemical to kill insects?

Pyrethrins and Pyrethroids These substances are made to mimic botanical insecticides, specifically varieties of chrysanthemum that are toxic to insects. They paralyze the offending pest before ultimately killing the insect. Pyrethrins and Pyrethroids are effective against most household insects and mosquitos.