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The Daily Insight

Do ants harm crepe myrtles

Author

Victoria Simmons

Published Mar 23, 2026

Crape myrtle hardiness varies by species, but most commonly grown varieties thrive in U.S. Department of Agriculture zones 6 to 9. All can suffer ant invasions.

Are ants bad for crepe myrtles?

In return for protecting aphids by fending off their predators, ants are paid for their service with a harvest of honeydew, which is a high-carbohydrate food source for them. However, their benefit is a detriment to crape myrtles.

What is eating my crepe myrtle leaves?

Crepe myrtle pests include aphids and mold. … Japanese beetles are another of the crepe myrtle pests that should be mentioned. These bugs will eat the tree. Their larvae are complete pests and with enough of these beetles, can destroy a whole tree.

Why are there ants on my crape myrtle?

A: Crape myrtles are commonly afflicted with aphids in the fall. These insects suck sap from leaves and then excrete a sweet honeydew that ants like. I am a big fan of using baits to control ants in your home. A bait product that contains borax (Terro, etc.)

What bugs kill crepe myrtles?

Crape myrtles (Lagerstroemia indica) are essentially trouble-free small trees. The most common problems include powdery mildew, Cercospora leaf spot, aphids, Japanese beetles, and sooty mold.

Do crepe myrtles attract insects?

Pollinators. Crape myrtles prefer full sunlight locations with periodic irrigation for vigorous growth and blossoming. … Beneficial insects visiting your crape myrtle, from bees to wasps, are attracted to both the bright flowers and honeydew residue left from aphid activity.

How do I keep ants off my crepe myrtle?

Spray the tree or shrub thoroughly two or three times per week until the insect population is reduced. This may also wash some honeydew off the crape myrtle. Try winding a sticky tape or insect barrier around the crape myrtle’s lower trunk to keep ants from climbing into the canopy.

Which plant attract ants?

Penstemon and peonies are some of the top flowers that attract ants, and it isn’t uncommon to see the insects crawling all over peony blossoms. However, ants most often are drawn to low-growing plants with small flowers, such as spurge. You can discourage ants from visiting your flowers by eliminating aphids.

How do you treat crepe myrtle aphids?

Crepe myrtle aphids. A daily blast with a garden hose on the underside of the leaves is an effective and environmentally friendly way to destroy whole aphid colonies. An imidacloprid drench can also help, but should be reserved for very bad cases because bees and other pollinators can also be affected.

Is crepe myrtle native to Virginia?

There are no species of plants in the crape myrtle genus native to North America, but introduced Lagerstroemia have been planted in incredibly large numbers in the southeastern United States. … In Norfolk, Virginia; Charleston, South Carolina; and Savannah, Georgia, for example, you see crape myrtles everywhere.

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How do you know when a crepe myrtle is dying?

Signs that your Crepe Myrtle is dying or dead Crepe Myrtles have thin bark, which you can scratch with your fingernail. You can do this to check the health of your tree. Tree care professionals call this the “scratch test.” If the bark underneath is green, your tree is still alive.

What are the tiny white bugs on my crepe myrtle leaves?

When crape myrtle leaves are covered in sooty mold, the crapemyrtle aphid is the likely culprit. … (Be aware that, once insects are killed, sooty mold will still remain on the plant for some time.) Aphids are soft-bodied insects that are susceptible to insecticides like insecticidal soaps and horticultural oils.

Why are the leaves on my crepe myrtle turning black?

Sooty mold is the black, crusty material that encompasses the leaves during the growing season. … Sucking insects, such as aphids and scales, are attracted to crape myrtles and will suck the leaves for plant juices. As they digest the plant nutrients, they excrete a very sugary substance that we call honeydew.

Do aphids fly?

Although aphids cannot fly for most of their life cycle, they can escape predators and accidental ingestion by herbivores by dropping off the plant onto the ground. … They are often attended by ants, for the honeydew they produce and are carried from plant to plant by the ants through their tunnels.

Do crepe myrtles attract hummingbirds and butterflies?

Crape myrtle is a year-round favorite in the South, where it thrives in the warmth and blooms from July to September. The spectacular flowers won’t stop attracting butterflies, bees and hummingbirds. You can even remove the first wave of flowers to encourage a second bloom.

Do hummingbirds like crape myrtles?

Hummingbirds like to feed from flowering shrubs that include azaleas, rhododendron, crape myrtle, weigela, rose of Sharon and butterfly bush.

What do aphids look like on a crepe myrtle?

Crapemyrtle aphids are small, fragile insects around 1⁄16 inch long. They are pale yellowish-green with black spots on the abdomen. Crapemyrtle aphids are easy to distinguish from other aphids that occasionally infest crapemyrtle. Winged adults have dark tipped antennae and two double-pronged humps on the back.

How do I get rid of whiteflies on my crepe myrtle?

  1. Buy a superior (or “summer”) horticultural oil, such as AllSeasons.
  2. Buy a pump-up sprayer with a wand (NOT a spray-top bottle).
  3. Mix and apply the oil strictly according to package directions.
  4. Spray late in the day, while the leaves are dry.
  5. Concentrate the spray on the UNDERSIDES of the leaves, where the bugs are.

What kills ants but is safe for plants?

While you can make a nontoxic solution of equal parts white vinegar and water, along with a squirt of dish soap, to kill ants on your plants, vinegar can harm vegetation because it’s very acidic. Instead, use such a mixture away from your plants and soil.

What kills ants and keep them away?

White vinegar, available at all grocery stores, is a cheap and effective way to kill and repel ants. It is also a natural cleaning agent. Try using a 1-to-1 vinegar/water mixture to clean hard surfaces, including floors and countertops, wherever ants are likely to travel.

How do I keep ants off my plants?

  1. Get rid of aphids and other sap-sucking pests. …
  2. Distribute artificial sweetener near the ants. …
  3. Sprinkle ground cinnamon or cayenne pepper around your plants. …
  4. Place food-grade diatomaceous earth by trails and nests. …
  5. Set a borax (or boric acid) and sugar poison trap.

Do squirrels eat crepe myrtle flowers?

Squirrels eat or experiment with all sorts of things, especially during the intervals between their primary fruit and nut foods. They remove several flowering tips from our crape myrtles every year… as well as an occasional bedding plant, turf runners, and small branches or bark from other trees.

Do crepe myrtles attract birds?

A garden with a crepe myrtle also enjoys bird song. Birds flock to crepe myrtle trees to eat the ripe berries and also to feast on insect pests.

Do deer eat crepe myrtles?

They are winter hardy in U.S. Department of Agriculture plant hardiness zones 7 to 9. Though the hungriest deer will eat plants not characteristic of its regular diet, deer will seldom eat any variety of crape myrtle.

What is the lifespan of a crepe myrtle?

Crepe myrtles live quite a few years if you take care of them. A crepe myrtle lifespan can exceed 50 years. So that’s the answer to the question “how long do crepe myrtle trees live?” They can live a good, long time with suitable care.

Can you over water crepe myrtles?

Watering Issues Crape myrtle trees need the most moisture in the soil profile when they are actively growing — when the plant displays leaves. … Overwatering crape myrtles in spring and summer can diminish flowering, since overly moist soil promotes leafy growth, not flower production.

What happens if you don't prune crepe myrtles?

Many varieties have beautiful bark and growth habits that can be enjoyed all year if trees are not heavily pruned. This unsightly, ugly pruning known as crape murder is not recommended. Once it’s done, it ruins the tree’s graceful natural shape for the rest of its life.

Should you put mulch around crepe myrtles?

During spring and summer, 4-6 inches of mulch should be placed a few inches away from the trunk to provide good air circulation. The best type of mulch for your crape myrtle is acid mulch, pine bark or oak leaves. Do not mulch with mushroom compost.

Do ants raise aphids?

In fact, ants farm aphids because, in return, they get a huge supply of their favorite sticky sweet treat. As aphids feed, they produce a sticky substance called honeydew, and ants simply cannot resist it.

Do ants help aphids?

Ants and aphids have a symbiotic relationship. … The ants provide protection from any predators that might go after the aphids. The aphids, in return, provide food for the ants. All aphids excrete a waste product called honeydew.

Do ants eat aphids?

Aphids are sucking insects that are common on both outdoor and indoor plants. They feed on the sap of plants and secrete a substance called honeydew. This sticky resin is a favorite food of ants, who actually “milk” the aphids for it by stroking their abdomen.