Initial evidence hinted that nicotine and other chemicals in the butts might help
deter insect pests from moving into the nests — nicotine does have anti-parasite properties — but it wasn't conclusive.
Not exact matches
Onions: Onions don't take up a lot of room above the ground, and are said to
deter many common
insect pests in the garden, such as aphids, slugs, and cabbage worms, making them a good companion plant for peppers.
Planting a border of marigolds around your vegetable garden has been known to reduce or
deter pest insects because they dislike the smell.