Crape myrtle aphid

The crape myrtle aphid (Sarucallis kahawaluokalani) belongs to the order Hemiptera and the family Aphididae. It is a highly host-specific pest that targets trees and shrubs within the Lagerstroemia genus, commonly known as crape myrtle.

This aphid exclusively infests crape myrtle species, with Lagerstroemia indica being the primary host. The insects congregate on the undersides of leaves, where they pierce the plant tissue to extract phloem sap, directly impacting the health and aesthetic quality of the plant.

The life cycle of this species is characterized by rapid reproduction, especially during warm, dry weather conditions. Being capable of asexual reproduction, these aphids can build up massive populations in a very short amount of time, making early detection crucial for management.

Damage symptoms typically include yellow spotting on leaves, leaf curling, and premature defoliation. A major secondary issue is the production of honeydew, which promotes the growth of black sooty mold, coating the foliage and reducing the tree's ability to perform photosynthesis effectively.

Effective control measures include:

• Application of systemic insecticides applied to the soil or foliage.
• Use of horticultural oils during the dormant season to reduce overwintering eggs.
• Promoting biological control agents like lady beetles and lacewings that naturally prey on aphid colonies.