D3461: Ecological Interactions between pests and natural enemies in field and container-grown crapemyrtle cultivars

Crapemyrtle (Lagerstroemia spp.) is one of the most popular ornamental tree in the southern United States, commonly planted in landscapes for its vibrant flower color, attractive bark, and overall aesthetic appeal. However, crapemyrtle production and landscapes are increasingly threatened by insect pests, particularly the crapemyrtle aphid (Tinocallis kahawaluokalani), which can cause significant damage and promote secondary issues such as sooty mold growth. Crapemyrtles also attract a variety of generalist natural enemies, including lady beetles, green and brown lacewings, syrphid flies, and parasitic wasps. This study investigated the seasonal dynamics and ecological interactions between pests and their natural enemies in both field and container-grown crapemyrtle cultivars. Populations of aphids and natural enemies such as lady beetles, lacewings, and parasitic wasps were monitored at regular intervals throughout the growing season. Results showed that pest and natural enemy populations varied over time and among planting sites. In addition, significant differences were observed between field and container-grown crapemyrtles, suggesting that environmental conditions and plant growth environments influence arthropod community dynamics. These findings highlight the importance of regular insect monitoring in crapemyrtle to support integrated pest management strategies and the conservation of natural enemies as part of a sustainable approach for both nursery and landscape settings.