Arthropods Daily – Issue No. 170

Harmonia axyridis, also known as the multicolored Asian lady beetle, is a coccinellid beetle native to eastern Asia but has been introduced to many countries worldwide. It is a voracious predator and was introduced as a biocontrol agent for aphids and scale insects. The beetle is known for its ability to form large aggregations, particularly during the cooler months when it seeks out crevices and other cool spaces to overwinter. Harmonia axyridis has defensive compounds in its hemolymph, including a molecule with broad-spectrum antimicrobial activity. Control methods for this invasive species include insecticides, trapping, removal of aggregates, and sealing openings to prevent entry into buildings.