and the petitioners apply terminology used by CDFA (Class A, B, C, and so on). The committee posed various questions to APHIS about its classification system for plant pests and how it is related to CDFA’s system. Figure 1 represents the committee’s best understanding of the relationships among the terms used by APHIS in these documents with respect to pests. The figure is purely descriptive; it does not represent any sort of recommendation or criticism by the committee regarding the relationship between these categories.

Figure 1: Committee’s understanding of the relationships between categories defined by IPPC and APHIS terminology2


This figure is intended to be descriptive. Any criterion implied by the figure is the committee’s interpretation of existing terminology, not a recommendation or a criticism. The petitions included terms used by CDFA; however, the Response from APHIS does not. Therefore, the committee has chosen not to represent CDFA terminology in this figure.

The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Terms of Use and Privacy Statement