Horticulture/Pest Control Methods
This is a template of sorts...
Barriers prevent the pest from reaching the plant.
Repellents are chemicals (or plants containing those chemicals) that make the pest avoid the plant.
Physical removal means removing the pests by hand, crushing them, blasting them with water, vacuuming them up, etc.
Trap crops are plants that the pest prefers over the plants you are trying to protect.
Poisons are chemicals that kill the pest. Most poisons are specific.