The AWA is enforced by the USDA, APHIS, and the Animal Care agency. This capability provides the USDA/APHIS/PPQ with greater fraud prevention, reporting functions, and monitoring capabilities. APHIS also oversees interstate transportation of snails. It was the first of three agencies that eventually were merged to form APHIS. In 2006, the concerns escalated between trainers and inspectors from APHIS. Curcurbitacin E has insecticidal effects against the aphid "Aphis craccivora". Exhibitors must be licensed by APHIS under Class C licenses. It includes many notorious agricultural pests, such as the soybean aphid "Aphis glycines". After APHIS prepared Environmental Impact Statements for both alfalfa and sugar beets they were approved. APHIS inspects animal research facilities regularly and reports are published online. There were also two river gunboats "Ladybird" and "Aphis", and three seaplane bombers. Another example is the soybean aphid ("Aphis glycines"). It also tends aphids such as the soybean aphid ("Aphis glycines"), harvesting honeydew. APHIS officials are responsible for inspecting the field trials. "Aphis craccivora" is a small species of aphid.