Comparative analysis of European pepper moth damage and host preference in greenhouse vs. field-grown container plants

The European pepper moth (Duponchelia fovealis Zeller) is an invasive pest with a wide host range, posing a growing threat to horticultural production across the United States. Since its detection, it has spread from northern to southern states, particularly affecting greenhouse and nursery crops. The present study evaluated the presence, injury patterns, and host preference of D. fovealis in two production environments: greenhouse and field-grown container plants. Ornamental species such as Chrysanthemum and Loropetalum were identified as preferred hosts, with feeding damage observed on leaves, stems, and growing points. Varietal differences in host preference were also noted, indicating potential differences in susceptibility among cultivars. Infestation levels were consistently higher in greenhouse-grown plants than in those in outdoor field conditions, likely due to the favorable temperature and humidity levels within enclosed environments. These findings highlight the importance of targeted monitoring and environment-specific pest management strategies. Understanding host and varietal preferences, along with environmental influences on pest incidence, is critical for reducing D. fovealis impact in containerized ornamental production. Continued research is warranted to understand the seasonal dynamics and develop integrated management approaches tailored to production environments.