Louisville Water Company.
University of Alaska - Anchorage. Alaska Center for Conservation Science.
University of Maryland. Home and Garden Information Center.
Utah Department of Agriculture and Food.
New York Codes, Rules, and Regulations.
Maryland Invasive Species Council.
New York Department of Environmental Conservation.
A regulation was adopted in 2014 that prohibits or regulates the possession, transport, importation, sale, purchase and introduction of select invasive species. The purpose of this regulation is to help control invasive species, a form of biological pollution, by reducing the introduction of new and spread of existing populations.
Kentucky Exotic Pest Plant Council.
University of Kentucky. College of Agriculture. Division of Regulatory Services.
University of Alaska - Anchorage. Alaska Natural Heritage Program.
Delaware Department of Natural Resources and Environmental Control. Natural Heritage Program.
New York State Agricultural Experiment Station.
USDA. Natural Resources Conservation Service.
Delaware Department of Natural Resources and Environmental Control. Natural Heritage and Endangered Species Program.
Alaska Department of Natural Resources. Division of Agriculture.
Michigan Department of Agriculture and Rural Development.
Kentucky Department of Fish and Wildlife Resources.