U.S. Faces Growing Threat from Invasive Pests

Invasive pests can hide in unexpected places and, once established, damage trees, crops, forests and the broader food supply. The U.S. Department of Agriculture’s Animal and Plant Health Inspection Service notes that these species often hitchhike on everyday items such as plants, produce, firewood, vehicles and outdoor equipment.

Pathways include travel abroad, where undeclared agricultural items can introduce pests, online purchases of seeds or plants that bypass permits, and outdoor activities like camping or moving firewood that spread insects such as the emerald ash borer. To limit spread, travelers are urged to declare all agricultural goods, shoppers should verify import requirements and use reputable sellers, and outdoor enthusiasts should use local firewood and clean gear before moving between areas.

Preventive actions at home moves—cleaning patio furniture, equipment and vehicles—can also reduce accidental transport of invasive insects.