Serpentine leafminers (Liriomyza huidobrensis) are small flies belonging to the family Agromyzidae. They seriously affect solanaceous crops (such as potato, tomato and eggplant), as well as crops in the Asteraceae, Cucurbitaceae and Fabaceae families. Currently, Australia remains free of this species of leafminer, which is now well established in nearby countries, including Indonesia. If the pest establishes itself in Australia, it could threaten the local potato industry. AUSVEG Biosecurity Officer Madeleine Quirk reports.