The Western Plant Diagnostic Network (WPDN) is a regional member of the larger National Plant Diagnostic Network (NPDN).

The WPDN comprises plant pest diagnostic labs and detection specialists in ten states in the western region of the United States, and two U.S. territories in the Pacific.

States and territories are represented by plant pathologists, entomologists, and weed specialists from land grant universities and/or State Departments of Agriculture. Learn more about the WPDN Region.