For sample questions please contact your state diagnostic lab Find your state lab
For all other question, contact the specific regional center or committee
Regional Centers
Great Plains Plant Diagnostic Network 
North Central Plant Diagnostic Network 
Northeast Plant Diagnostic Network 
Southern Plant Diagnostic Network 
Western Plant Diagnostic Network 
Center for Environmental and Regulatory Information Systems 
NPDN IT support 
National Data Committee 
Accreditation Committee 
Professional Development Committee 
Protocols & Validation Committee 
Proficiency Committee 
Outreach & Extension Committee 
Online Communications Committee 
Regulatory Relations Committee 
LIMS Technical Committee 
NPDN Communicator newsletter editor 
Beltsville Workshops Program
Star-D Accreditation Program
GPDN Webinars Coordinators
NPDN National Program coordination