What Animals Eat Basil? Common Pests & How to Stop Them

By James Wilson · January 23, 2026

What Animals Eat Basil?

Basil is commonly consumed by deer, rabbits, slugs, snails, aphids, and caterpillars. These animals are attracted to basil’s tender leaves and aromatic oils, often causing significant damage to garden plants.

Common Animals That Feed on Basil

Basil (Ocimum basilicum) is a popular herb prized for its culinary and aromatic qualities. However, its appealing scent and soft foliage also attract various animals and pests. Understanding which creatures consume basil helps gardeners protect their crops effectively.

Mammals That Eat Basil

Deer: Frequently browse on basil, especially in rural or suburban areas with high deer populations.
Rabbits: Known to nibble on young basil plants, particularly in early growing seasons.
Rodents (e.g., mice): Occasionally feed on basil when other food sources are scarce.

Insects and Invertebrates That Damage Basil

Aphids: Small sap-sucking insects that cluster on stems and undersides of leaves.
Spider mites: Thrive in dry conditions and cause stippling on leaves.
Whiteflies: Found under leaves; they weaken plants by feeding on sap.
Slugs and snails: Nocturnal feeders that leave irregular holes and slime trails.
Caterpillars: Including tomato hornworms, which may also target basil nearby.

Preventing Basil from Being Eaten

Protecting basil involves physical, biological, and cultural strategies tailored to the type of animal involved.

Effective Deterrent Methods

Fencing: Install mesh fences at least 2 feet high to deter rabbits and taller barriers for deer.
Companion planting: Grow basil near garlic, chives, or marigolds to repel certain pests naturally.
Organic sprays: Neem oil or insecticidal soap can control aphids and mites.
Handpicking: Remove slugs and caterpillars manually during evening hours.
Use of row covers: Lightweight fabric covers prevent insect access while allowing light and water through.

Animal/Pest	Feeding Frequency	Typical Damage	Regional Prevalence (US)	Best Control Method
Deer	High	Entire plant stripped	Widespread (Northeast, Midwest)	8-foot fencing
Rabbits	Medium-High	Cut stems at base	Suburban nationwide	2-foot wire mesh
Slugs/Snails	High	Holes in leaves, slime trails	Humid regions (Pacific NW)	Diatomaceous earth
Aphids	Very High	Curled, yellowing leaves	Nationwide	Neem oil spray
Caterpillars	Medium	Irregular leaf loss	Seasonal (Summer)	BT (Bacillus thuringiensis)

Table data source:1, 2, 3

The table highlights that aphids have the highest feeding frequency across regions, while deer cause the most severe damage. Integrated pest management combining physical barriers and organic treatments offers the best long-term protection.

FAQ About Animals That Eat Basil

Do squirrels eat basil plants?

Squirrels rarely eat basil. While they may occasionally dig around the base of plants, they are not known to consume basil leaves. Their primary interest is usually nuts or seeds, not herbs.

Can chickens eat basil safely?

Yes, chickens can safely eat basil in moderation. It provides antioxidants and may support respiratory health. However, it should be part of a varied diet and not replace standard poultry feed.

Are there any beneficial insects that eat basil?

No beneficial insects feed directly on basil plants. However, predatory insects like ladybugs and lacewings are attracted to basil flowers and help control aphids and mites without damaging the plant.

Why are my basil leaves disappearing overnight?

This is likely due to nocturnal feeders such as slugs, snails, or earwigs. Check plants at night with a flashlight or place damp cardboard nearby to trap these pests and confirm their presence.

Does planting basil keep animals away?

Basil can deter some pests like mosquitoes and thrips due to its essential oils, but it attracts others like aphids. It is not a reliable standalone repellent for larger animals such as deer or rabbits.