Crape Myrtle Bark Scale

Understanding Crape Myrtle Bark Scale in North Carolina

Crape myrtles, known for their vibrant blooms and hardy nature, are a staple in North Carolina landscapes. However, these beautiful trees face a growing threat: crape myrtle bark scale (CMBS). This invasive pest, first identified in the U.S. in 2004, has become increasingly prevalent in the Southeast, including North Carolina.

What is Crape Myrtle Bark Scale?

Crape myrtle bark scale (Acanthococcus lagerstroemiae) is a small, white or gray insect that infests the bark of crape myrtles. These pests often appear as white, waxy encrustations on the branches and trunks of the trees. Underneath this waxy coating, the scales are pinkish-red and can exude a red liquid when crushed.

How Does It Damage the Trees?

CMBS feeds on the sap of crape myrtles, weakening the trees and making them more susceptible to other stresses. The most noticeable sign of an infestation is the presence of black sooty mold, which grows on the honeydew excreted by the scales. This mold can cover the leaves and branches, hindering photosynthesis and diminishing the tree's overall health and aesthetic appeal. Over time, heavy infestations can lead to reduced flowering and even the death of branches.

How Can It Be Treated?

  1. Mechanical Removal: Prune and destroy heavily infested branches to reduce the population. Scrubbing the bark with a soft brush and soapy water can help remove the scales.

  2. Chemical Control: Apply systemic insecticides like imidacloprid or dinotefuran to the soil around the tree. These chemicals are absorbed by the roots and distributed throughout the tree, killing the scales as they feed.

  3. Horticultural Oils: Use horticultural oils to smother the scales. These oils are effective during the dormant season and can be applied directly to the infested areas.

Why Should It Be Treated?

Treating CMBS is crucial to maintaining the health and beauty of crape myrtles. Left untreated, infestations can spread to other crape myrtles and potentially other plant species. Managing CMBS helps preserve the ornamental value of crape myrtles, ensures their long-term health, and prevents the spread of this invasive pest to neighboring landscapes.

How Can TLG Help?

Professional landscapers play a vital role in managing CMBS infestations. They can:

  • Accurately Identify Infestations: Landscapers are trained to recognize the early signs of CMBS, ensuring timely and effective intervention.

  • Implement Integrated Pest Management (IPM): A comprehensive approach combining mechanical, chemical, and cultural control methods tailored to the specific landscape.

  • Apply Treatments Safely: Landscapers have the expertise to apply insecticides and horticultural oils safely and effectively, minimizing risks to people, pets, and the environment.

  • Educate Homeowners: Landscapers can provide valuable information on preventing future infestations and maintaining healthy crape myrtles.

By addressing CMBS promptly and effectively, homeowners and landscapers can work together to preserve the beauty and health of crape myrtles in North Carolina landscapes.

Email info@tlgturfcare.com with further questions and information.

General Information, Seasonal InformationDoug HolsteCrape Myrtle, Bark Scale, Pest