Bay leaves are the most efficient and natural cockroaches repellent. Both, dry or fresh bay leaves can be used as cockroach repellent, but still crushed dry leaves in a powder form are most efficient as they release much stronger smell.
Bay leaves are the best natural cockroach repellent. This herb can’t kill them, but it the drives them away quickly because the smell is unbearable for the cockroach. Place laurel branches in every corner of the house.