As your car, truck, all-terrain vehicle, or trailer drives through a field containing flowering weeds, or backs into a lake containing New Zealand mud snails, chances are that these species will attach to some part of the vehicle and hitchhike their way to a new location. Invasive species may be transported on tires, wheel wells, undercarriage, or otherwise on vehicles, farm equipment, and mobile machinery. Species that may be introduced by this pathway include common crupina, Dalmatian toadflax, knapweeds, leafy spurge, tansy ragwort, and yellow starthistle.
To help prevent the spread of invasive species, you can inspect and clean thoroughly your vehicle after driving through a potentially infested area.
For more information, see the following Web sites: