APHIS stands for the Animal and Plant Health Inspection Service, which is a part of the United States Department of Agriculture. It is responsible for protecting and promoting animal and plant health in the United States. The term APHIS can be broken down into three crossword solutions: PEST (4 letters), LOUSE (5 letters), and PHYLLOXERA (10 letters). PEST refers to any organism that causes damage to crops, livestock, or other resources. LOUSE is an insect that feeds on the blood of humans and animals. Phylloxera is a type of aphid that feeds on the roots of grapevines, causing them to become weakened and eventually die.