This paper begins with a short background on past agricultural catastrophes, past biological weapons programs targeting agriculture, and the feasibility of an agroterrorist attack. It suggests several ways that the USDA can respond to this threat of "agroterrorism." The recommendations put forth are specifically intended to counter this threat, but they will also improve overall disease control capabilities, whether or not an attack occurs. The threat of an agroterrorist attack can be countered on four levels, which correspond to four prongs of a comprehensive strategy to counter agroterrorism. This paper examines the four levels, explaining the central concerns of each and making relevant recommendations for USDA action.