Wax Myrtle Decline After Frost and Insects: Need On-Site Diagnosis

Wax myrtles planted in Feb 2009 had frost damage, then insect defoliation. Bayer systemic and Spectracide failed; one dead, another declining. Expert recommends a “house call” by a county extension agent or arborist. Collect insects in a jar for ID at a nursery. Bayer’s imidacloprid works on many pests but not all. Knowing the pest is essential for correct treatment.

Steps

1. Contact county Cooperative Extension for a site visit.
2. Collect insects for nursery ID.
3. Match insecticide to pest.
4. Don’t assume—verify.

Email diagnosis has limits; eyes on the plant are better.