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The Global Insight

What kind of caterpillar is eating my parsley

Author

Ava Hall

Updated on April 14, 2026

Check out 6 common swallowtail butterflies you should know. This caterpillar is also called a parsley caterpillar or parsley worm because it can eat toxins from its host plants in the carrot family, including carrots, parsnips, parsley, dill, and even Queen Anne’s lace.

How do I get rid of caterpillars on my parsley plant?

Worm control on parsley is fairly simple if you really desire their eradication. They are easy to spot and handpick. They are also naturally attacked by parasites, or if you must, insecticides such as Sevin or Bacillus thuringiensis will kill off the caterpillars.

Do caterpillars eat parsley plants?

Carrots, Parsley, Dill, Fennel, Queen Anne’s Lace: not native. And this is a very true statement, Black Swallowtail caterpillars do, indeed, use all of these as host plants.

What caterpillar eats parsley?

Parsley worms are the larval stage of the Eastern black swallowtail butterfly ( Papilio polyxenes asterius). These butterflies are quite common in our area, and their caterpillars feed on many different species of plants in the carrot family ( Apiaceae), including parsley, parsnips, caraway, fennel and dill.

What is eating my parsley at night?

Armyworms. These green/brown caterpillars are the larval stage of the moth species Pseudaletia unipuncta. Normally growing to a length of 1-2 inches, these caterpillars spend their days hiding in the soil at the base of parsley plants and come out to feed only during nocturnal hours.

How do I protect my plants from caterpillars?

Place cardboard or tin foil at the base of your plants to repel caterpillars. This can be an effective deterrent for some varieties. Keep the ground around your plants free from debris where eggs might hide.

What is eating my parsley plant?

The black swallowtail butterfly uses members of the Apiaceae family as host plants. The adult butterflies lay their eggs on plants of this family; when the caterpillars hatch, these plants serve as their primary food source.

Will monarch caterpillars eat parsley?

Monarch caterpillars do not eat parsley and Black Swallowtail caterpillars do not eat milkweed, and if either attempted, they would not survive. … The diet of the Black Swallowtail caterpillar includes the foliage and flowers of carrot plants, fennel, dill, parsley, Queen Anne’s lace, and parsnips.

Can you touch a parsley worm?

Black swallowtail caterpillars are called parsley worms because they are commonly found on plants in the parsley family, Apiaceae, which includes carrots, fennel, dill, hemlock, Queen Anne’s lace, parsnips, anise, and coriander. (Other kinds of swallowtail caterpillars have them too.) …

Are parsley caterpillars bad?

This caterpillar is also called a parsley caterpillar or parsley worm because it can eat toxins from its host plants in the carrot family, including carrots, parsnips, parsley, dill, and even Queen Anne’s lace. According to Texas A&M University, it’s a bad-tasting caterpillar so birds and predators won’t touch it.

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Where do parsley caterpillars come from?

After mating, the female swallowtail searches for wild plants in the carrot family such as Queen Anne’s lace or cultivated delicacies including carrot, fennel, dill, and parsley. She lays a few eggs on a plant and in a matter of days these hatch into tiny caterpillars.

How long does it take for a parsley worm to turn into a butterfly?

Monarch caterpillars are generally reliable in taking 10-14 days to eclose, or make the transition from chrysalis to butterfly. Swallowtails, in contrast, can take a few weeks to many months to emerge.

Are black swallowtail caterpillar poisonous?

The pipevine swallowtail is highly poisonous, for its caterpillars feed on plants in the genus Aristolochia, which are defended by aristolochic acids. Pipevine swallowtail caterpillars consume the leaves and store or sequester poisonous aristolochic acids, which are retained by pupae and adults.

Do squirrels eat parsley?

Parsley. Used as a garnish in many world cuisines, parsley is probably one of the most popular herbs out there—and not just for humans, but squirrels as well. … Parsley is also a source of antioxidants. It’s also rich in vitamins, which is why squirrels don’t shy away from munching on this herb.

How do you treat parsley worms?

Provide plenty of food to help your caterpillar grow and develop. Feed Queen Anne’s lace, parsley and fennel. Keep plant leaves in water to prevent them from drying out. As your caterpillar grows offer fresh leaves three or four times per day.

Do groundhogs like parsley?

They’re still very much active outside, and they’re fairly fond of parsley. … Groundhogs like parsley, too, but I’d cross them off of suspect list now since they’re in hibernation for winter. You probably won’t see any new growth on your “parsley sticks” now, but I wouldn’t yank the plant.

What is eating my parsley leaves Australia?

If it’s a nibble in a bud it may be from earwigs, slugs or snails. If half the bush has been munched and the other half torn down to ground level, it’s a wallaby. But, usually, it’s possums.

How do I keep caterpillars off my herbs?

  1. Soap and Water. An inexpensive remedy to stop little green caterpillars from eating your plants is soap and water. …
  2. Organic Bt (Bacillus thuringiensis) …
  3. Neem Oil. …
  4. Pepper and Garlic Mixture. …
  5. Chili Spray. …
  6. Create a Habitat Friendly to Birds. …
  7. Vinegar Solution. …
  8. Use Burlap.

Can plants recover from caterpillars?

The caterpillars of the gypsy moth (Lymantria dispar) are voracious foliage feeders that will eat the leaves of a wide variety of shrubs and trees. … Healthy plants can regrow their leaves, so chances are good your shrubs will recover from the attack.

Should I remove parsley worms?

When the caterpillars compete with you for your parsley and cause more damage than is acceptable, you may choose to kill them – even though they do grow up to be butterflies. But, you need to do it at an earlier stage instead of waiting for them to eat, grow large and cause so much damage.

What kind of worm looks like parsley?

Black swallowtails eat plants from the Apiaceae or Umbelliferae family commonly known as the celery, carrot or parsley family. These two caterpillars look similar but have different diets. Monarchs will only feed on milkweeds while Black Swallowtail will eat a variety of herbs in the carrot family (Apiaceae).

How do you attract parsley worms?

Many gardeners who are butterfly enthusiasts actually encourage the parsley worm in their gardens by planting special crops of fennel, dill or parsley just to attract the butterflies and promote an active swallowtail population.

What kind of caterpillar likes dill?

Eastern Black Swallowtail caterpillars love to eat dill. Like all caterpillars, these little guys go through five stages of development.

What does monarch caterpillar look like?

First instar caterpillars are very small and may be pale green or grayish white, appearing almost translucent. Subsequent instars are distinctly striped in yellow, white, and black, with a pair of black tentacles on both ends of their bodies.

What does the yellow swallowtail caterpillar look like?

Eastern swallowtail caterpillars are green with large yellow and black decoy eyespots. They also have orange “horns” they can extend when they feel threatened.

Can you touch Black Swallowtail caterpillars?

One more note about the Black Swallowtail caterpillar: it is safe to humans to hold and touch the caterpillar. It is not always safe for the caterpillar, however. The smaller they are, the more delicate they are. Also, they will molt as they grow (see life cycle of a butterfly for more information).

What's a swallowtail butterfly look like?

It features a line of large yellow spots directly across the wings, and another line above the trailing edges. The body of the Giant Swallowtail is mostly yellow, and the underside a pale yellow with iridescent light blue patches. Shiny black with iridescent blue hind wings with arrowhead-shaped white spots.

What butterfly eats parsley?

Parsley is a host plant for Black Swallowtail butterflies (Anise Swallowtail butterflies in the West). Either Black or Anise Swallowtail butterflies can be found in almost all of the USA and up into Canada.

How big does a swallowtail caterpillar get?

The typical size is in the 2.5″ – 4.0″ range.

Can you buy swallowtail caterpillars?

You may purchase your host plant from Shady Oak Butterfly Farm or from a local plant nursery. … Be certain the plant has not been sprayed with insecticides, including the organic pesticide, BT. Caterpillars usually take from one to three weeks to reach pupation size.

How do you raise a swallowtail caterpillar?

Bring in some sprigs of fresh plant and put them in the jar. I usually leave the eggs alone until the caterpillars are big enough to spot with a naked eye–generally two days. You’ll see they’re tiny and hard to monitor, so again, leave them alone and just provide fresh air and fresh host plant until they grow bigger.