The states most vulnerable to economic attack on the agricultural sector are those with several or most of the following attributes:

--high-density, large area agriculture

--heavy reliance on monoculture of a restricted range of genotypes

--free of specific serious animal and plant pathogens or pests

--major agricultural exporter, or heavily dependent on a few domestic agricultural products

--suffering serious domestic unrest, or the target of international terrorism, or unfriendly neighbor of states likely to be developing BW programs

--weak plant and animal epidemiological infrastructure

For such at-risk states, the threat of biological attack against its agricultural sector should be taken quite seriously, and preventative and punitive measures put in place. Note that five of these specific risk factors characterize US agriculture.