Your company account is blocked and you cannot place orders. If you have questions, please contact your company administrator.
EOP - Early Order Program

Azalea Whitefly Diagnostic Guide

Pealius azaleae

Azalea whitefly, Pealius azalea, is a common pest of azalea in the landscape. It is very similar to other whiteflies in that it lives and feeds primarily on the undersides of leaves. Whiteflies suck out the plant juices causing yellowing of leaves. They also cause a sticky sap like substance, called honeydew, to coat leaves. This honeydew can attract other insects as well as allow black sooty mold to grow on coated surfaces.

Shrubs at Risk

Azaleas are known to be infested by azalea whitefly.

Azalea

Signs of Damage

  • Eggs, nymphs, adults, and skin casts can be seen on the underside of leaves.
  • Leaves become yellow from whiteflies sucking the sap from them.
  • Sooty mold will often grow on excreted honeydew.
  • Heavy infestations may cause leaf cupping.
Whitefly Signs

John A. Weidhass, Virginia Polytechnic Institute and State University, Bugwood.org

Physical Appearance

  • Small, white, two-winged flies emerge as a cloud when host plant is disturbed.
  • Pupae are yellow and lack fringes common to other whitefly species, and look similar to scale insects.
Whitefly Signs

Clemson University – USDA Cooperative Extension Slide Series, Bugwood.org

Whitefly Signs

John A. Weidhass, Virginia Polytechnic Institute and State University, Bugwood.org

Treatment Strategy

Monitoring and catching populations early will help greatly with control efforts. Systemic insecticides are the easiest products to use to control this insect since whiteflies feed primarily on the undersides of leaves, making foliar sprays a difficult option. Begin Xytect™ applications in the fall for next season control. Early spring applications can work but you must get the product applied before nymphs emerge in May. Transtect™ applications can provide current season control, and should begin in May with the hatch of eggs.

  • Soil Application using Xytect 2F

    Dosage: 3-6 ml/inch DBH or foot of shrub height
    Timing: Preferable in fall, but anytime during the growing season
    Re-Treatment: Annually
    Xytect 2F
    Xytect 2F
    $69.60
  • Soil Application using Transtect

    Dosage: 1 packet/5 inches DBH
    Timing: Spring
    Re-Treatment: Annually
    Transtect
    Transtect
    $326.00
  • Soil Application using Xytect 75WSP 22 packets

    Dosage: 1 packet for 24-48 feet of shrub height
    Timing: Apply late summer to early fall
    Re-Treatment: Annually
    Xytect 75WSP 22 packets
    Xytect 75WSP 22 packets
    $148.00
  • Foliar Spray using Xytect 75WSP 22 packets

    Dosage: 1 packet/300 gallons of water
    Timing: Apply when insects are visible
    Re-Treatment: Annually
    Xytect 75WSP 22 packets
    Xytect 75WSP 22 packets
    $148.00

Treatment Expectations

Systemic insecticides are very effective for controlling this insect.

A Diagnostic Guide is designed to help you identify a pest issue and management solutions. Always refer to product label for all rates and approved uses. Some images courtesy forestryimages.org. Use of the images does not imply endorsement of treatments by forestryimages.org

Tech Support: 1-877-272-6747 or info@treecarescience.com