Red-winged lycid beetle

Systematic position: The red-winged lycid beetle (Metriorhynchus rufipennis) is a member of the family Lycidae, order Coleoptera. These beetles are easily identified by their soft, often bright-colored elytra, which function as aposematic signaling to warn predators of their chemical defenses, common among species in this family.

Affected crops: While primarily associated with forest habitats, this beetle can interact with agricultural landscapes. It is typically found in proximity to fruit orchards and woody ornamental plantations, where it may temporarily inhabit plants that are already experiencing physiological stress or are in the process of decay.

Biology and life cycle: The insect undergoes complete metamorphosis (holometabolism). The larval stage is generally spent in decaying wood or beneath bark, where larvae feed on fungi or organic matter. As adults, they emerge and are frequently seen feeding on floral resources, nectar, and pollen, displaying active movement throughout the warm summer months.

Nature of damage and harmfulness: The direct impact of this species on healthy crops is usually minimal. The damage is primarily categorized as secondary or incidental, as the feeding activity of larvae may contribute to the breakdown of woody tissue, potentially facilitating entry for pathogens into the vascular system of the weakened host plant.

Protection measures: Integrated pest management strategies are essential for controlling populations of Metriorhynchus rufipennis in agricultural areas.

• Prioritize the removal and destruction of decaying woody debris from fields and orchards.
• Promote plant health through balanced irrigation and fertilization to minimize host vulnerability.
• Utilize targeted insecticide applications only if adult populations exceed economic injury thresholds during critical growth stages.