Invasive species continue to pose a major threat to Iowa’s forests, woodlands, and natural habitats. Pests and plants such as the emerald ash borer, Asian longhorned beetle, spongy moth, and oriental bittersweet can damage or destroy native trees, crowd out beneficial plants, and negatively impact wildlife across the state.
Each year, Iowa’s forests, waterways, and outdoor recreation areas attract hundreds of thousands of visitors. While enjoying nature, people can unknowingly help spread invasive species by transporting seeds, insects, or egg masses on clothing, footwear, outdoor equipment, and firewood.
The Iowa Department of Natural Resources is encouraging residents and visitors to take a few simple steps to help slow the spread of invasive species.
Before purchasing plants for landscaping or gardening projects, homeowners should verify that the plants are not considered invasive. Many non-native species can quickly spread and become harmful to local ecosystems.
Outdoor enthusiasts traveling from areas under spongy moth quarantine should inspect camping gear, vehicles, and equipment for egg masses before returning home. Hikers are also encouraged to clean their boots before and after visiting natural areas to prevent spreading seeds from invasive plants such as garlic mustard.
Another important recommendation is to avoid transporting firewood across county lines. Firewood can harbor destructive pests and diseases, including emerald ash borer, Asian longhorned beetle, Sirex woodwasp, and oak wilt. Campers should purchase firewood locally, burn it completely at their campsite, and avoid moving leftover wood to another location.
Private woodland owners can also work with district foresters to develop management plans that strengthen forest health and improve resilience against invasive species.
