April is Invasive Plant Pest and Disease Awareness Month, and the US Department of Agriculture (USDA) is asking the public to help prevent the spread of invasive pests, which cost the US nation an estimated $120 billion each year in damages to the environment, agriculture and native species. USDA's Animal and Plant Health Inspection Service (APHIS) has identified 18 “Hungry Pests” as some of the most destructive invasive species that people can unknowingly spread in the things t...