Invasive species have been introduced through many avenues. Intentional introductions have been made for agricultural crops, landscaping, ornamental plants, and for the pet trade. Once introduced, a few species have escaped cultivation or domestication and have established viable populations in the wild. Some of these populations not only survive, but thrive and increase.
Accidental introductions include contaminated freight such as plants, wood, or food that contain propagules of invasive species, such as seeds, eggs, spores, or other biological material capable …