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Cardin's Whitefly Diagnostic Guide

Metaleurodicus cardini

Cardin’s whitefly, Metaleurodicus cardini, has been known in Florida since 1917. It was originally described from Cuba and was named for Professor Patricio Cardin. This pest is usually found in low populations causing little harm but occasionally reach damaging levels. These situations usually occur when something has disrupted the parasite/predator complex.

Trees at Risk

Guava, Duranta, Allspice, Citrus, Barbados cherry, Eugenia, Fiddlewood, Melaleuca, Paurotis palm, Plumeria, and Willow bustic.

Affects trees in central through south Florida, but most common in sub-tropical areas.

Guava

Duranta

Allspice

Citrus

Barbados Cherry

Eugenia

Fiddlewood

Melaleuca

Paurotis Palm

Plumeria

Willow Bustic

Cardin’s whitefly

Lyle J. Buss, University of Florida

Signs of Damage

  • The adults are greenish yellow with a fine dusting of white wax. Their wings are somewhat dusky with a conspicuous dark spot near the center of each wing.
  • As females deposit eggs, a fine trail of fluffy white wax is rubbed from a tuft of wax on the underside of the abdomen.
  • The pupal cases are just short of 1 mm long and 0.6 mm wide. They are elongate-oval in shape and elevated on a vertical marginal waxen fringe.
  • Pupal cases are yellowish-white in color and are semi-transparent when empty.

Physical Appearance

The adult is distinguished readily from all other whiteflies known in Florida by the distinct dark spot on each wing.

Cardin’s whitefly

Lyle J. Buss, University of Florida

Treatment Strategy

Field diagnosis of the insect and the host plant are usually sufficient.

Other Treatment Practices

Bag clippings and remove from premises after pruning. This will help lower local populations. Inspect all nursery stock upon delivery or installation.

  • Soil Application using Xytect 2F

    Dosage: 0.1 - 0.2 oz/in DBH
    Timing: Any time the ground is not frozen
    Re-Treatment: Annually
    Xytect 2F Insecticide
    Xytect 2F Login for pricing
  • Foliar Spray using Xytect 2F

    Dosage: 1.5 oz/100 gal water
    Timing: When pest is active
    Re-Treatment: Annually as needed
    Xytect 2F Insecticide
    Xytect 2F Login for pricing
  • Soil Application using Xytect 75WSP 22 packets

    Dosage: 1 pkt/24 - 48 in DBH
    Timing: Any time the ground is not frozen
    Re-Treatment: Annually
    Xytect 75WSP 22 packets
    Xytect 75WSP 22 packets Login for pricing
  • Foliar Spray using Xytect 75WSP 22 packets

    Dosage: 1 pkt/300 gal water
    Timing: When pest is active
    Re-Treatment: Annually as needed
    Xytect 75WSP 22 packets
    Xytect 75WSP 22 packets Login for pricing
  • Soil Application using Transtect

    Dosage: 1 pkt/5 - 17 in DBH, or 10 - 17 ft shrub height
    Timing: Early spring - summer
    Re-Treatment: Annually
    Transtect 70WSP Insecticide
    Transtect Login for pricing
  • Foliar Spray using Transtect

    Dosage: 1 pkt/25 - 50 gal water
    Timing: When pest is active
    Re-Treatment: Annually as needed
    Transtect 70WSP Insecticide
    Transtect Login for pricing
  • Foliar Spray using RTSA Horticultural Oil

    Dosage: 8 - 12 oz Distance/100 gal water + 0.5 gal RTSA Hort Oil
    Timing: When pest is active. NOTE: Use caution during periods of heat and on drought stressed plants. Oils applied after October may increase cold damage to citrus trees; applied in August and September may affect solid contents, may retard color.
    Re-Treatment: Annually as needed
    RTSA Horticultural Oil
    RTSA Horticultural Oil Login for pricing
  • Foliar Spray using RTSA Horticultural Oil

    Dosage: 2 - 3 gal/100 gal water
    Timing: During the dormant season
    Re-Treatment: Annually as needed
    RTSA Horticultural Oil
    RTSA Horticultural Oil Login for pricing

Treatment Strategy Expectation

Systemic insecticides are very useful 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

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