T
The Daily Insight

Are ants bad for crepe myrtles

Author

Dylan Hughes

Published May 06, 2026

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.

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.

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.

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.

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.

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.

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.

Do crepe myrtles attract aphids?

Most crape myrtle varieties thrive in U.S. Department of Agriculture plant hardiness zones 7 to 10 but some grow in USDA zone 6. Crape myrtles attract aphids, Japanese beetles and primrose flea beetles. Plants are susceptible to fungi that lead to powdery mildew and sooty mold.

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.

Article first time published on

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.

What is the black stuff on my crepe myrtles?

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.

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.

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.

What does an aphid look like?

Aphids are tiny (adults are under 1/4-inch), and often nearly invisible to the naked eye. Various species can appear white, black, brown, gray, yellow, light green, or even pink! Some may have a waxy or woolly coating. They have pear-shaped bodies with long antennae; the nymphs look similar to adults.

Do crepe myrtles get spider mites?

Water-stressed crape myrtles are vulnerable to spider mites. In water-scarce areas, use drip irrigation to keep the myrtles healthy.

Should you trim crepe myrtle bushes?

Though many people plant crape myrtles, few people prune them correctly. Correct pruning yields gracefully shaped trees with more blooms that are held upright on strong stems. … Crape myrtles bloom on new growth, so prune them in early spring before they break dormancy.

What's in insecticidal soap?

What Exactly Is Insecticidal Soap? The active ingredients in insecticidal soap are potassium salts of fatty acids (also known as soap salts), which are created when the chemical compound alkali mixes with the fatty acids found in natural oils, including castor oil, coconut oil, and olive oil.

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.

How often should crepe myrtles be watered?

Water For Crape Myrtle To prevent the plant from dying, it must be watered once a week. Be sure to soak the entire root system deeply, this will take about 45-60 minutes. For best growth and production, crape myrtles should receive at least one inch of water a week. During dry spells, water is mandatory.

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.

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.

How do you treat white spots on crepe myrtles?

Apply a soil drench – Drench the soil between the tree’s drip line and the trunk, using a systemic insecticide such as Bayer Advanced Garden Tree and Shrub Insect Control, Bonide Annual Tree and Shrub Insect Control, or Greenlight Tree and Shrub Insect Control.

How do you treat white mold on crepe myrtles?

Apply fungicide. Find a fungicide specifically formulated for mildew on crape myrtles or use a generic fungicide that contains one of these ingredients: propiconazole, tebuconazole, thiophanate-methyl, myclobutanil or triadimefon. Apply as directed; keep applying until the mildew has retreated.

Can I save my crepe myrtle?

Cut off the dead top and let the shoots grow. They’ll grow faster than a congressman’s nose. Select 4-5 well-spaced ones to become the new main trunks and cut off the rest. Your crepe myrtle will grow back free-of-charge and may even bloom this summer.

Why is my newly planted crepe myrtle dying?

Sometimes roots don’t have enough room to spread out or didn’t get enough water right after being planted. Whatever the case, trees wear their heart on their sleeve–or should we say their leaves. That’s why you see those wilted, yellow or brown leaves.