Ailanthus Webworm

This southern critter spends its summers in the North.
Webworm Garden Pests

Webworm Garden Pests


This colorful moth spends much of its time in close association with tree-of-heaven (Ailanthus altissima), a gangly tree known for its propensity to produce volunteers and grow in even the most formidable locations. Folding over a few leaves of the ailanthus, the webworm lays its eggs, and the emerging larvae eat the leaves.

A native of Central and South America, the ailanthus webworm can't overwinter in cold areas. Instead, the adults fan out over the continental U.S. and as far north as southern Canada. The adult visits flowers and is considered a pollinator; the ailanthus webworm is rarely a garden pest.

Keep Reading

Next Up

How to Provide Sharp Drainage for Your Plants

If your landscape require sharp drainage, follow these tips for successful gardening all year round.

Five Fabulous Potting Benches

Form and function come together in these essential garden workhorses.

Parasitic Wasps

The early stages of this common wasp feed on the young of other insects.

What Would Don Draper Plant?

It's doubtful that the "Mad Men" hunk spent his mandatory leave of absence in the garden. But if he did, here's what he might have planted.

Beneficial Reptiles in the Garden

Find out how to encourage and work with these garden helpmates.

Ways to Save Time and Money in the Garden

Have an attractive, more useful garden with less time, effort, money and resources.

What Kind of Garden Do You Have?

What you do with your garden will be affected by whether it is brand new, established or neglected. Here's how to tell which kind you have, and how you can make it flourish.

Flannel Moth Caterpillar

The one-inch-long flannel moth caterpillar is fluffy but definitely not friendly. Don't let this cute Einstein-like visage fool you!

Community Gardens: What are the Rules of the Rows?

Community gardens can be great ways to grow food and improve your community. But certain behavior is expected. Learn more about community garden etiquette.

What Is a Gall?

Get the facts on galls and why they form on plants.

1,000+ Photos

Browse beautiful photos of our favorite outdoor spaces: decks, patios, porches and more.

Follow Us Everywhere

Join the party! Don't miss HGTV in your favorite social media feeds.