http://www.aphis.usda.gov/plant_health/ ... ndex.shtml
Permits are required for the importation, transit, domestic movement and environmental release of Organisms that impact plants, and the importation and transit of Plants and Plant Products under authority of the Plant Protection and Honeybee Acts.
Organism Permits
Organism Permits include Plant Pests such as insects and snails; Plant Pathogens such as fungi, bacteria, and virus’; Biological Control Agents, Bees, Plant Pest Diagnostic Laboratories, Soil Microbe Isolation Laboratories, Federal Noxious Weeds and Parasitic Plants.