Clarissa Balbalian (Chair, National Data Committee)
The Communicator: Volume 6, Issue 12, December 2025
The following lists document additions, modifications and deletions to the National Data Repository (NDR) Host and Pest dictionaries that were implemented in November. You can view updates to the NPDN host and pest dictionaries any time by logging into NDR clicking on the Dictionaries tab, selecting the Change Request tab, and selecting Updates from the dropdown menu.
A guideline to understanding data dictionaries in the NDR is available to NPDN members online. NPDN members also have access to an online guideline on how to request new host/pest codes or changes to existing codes. Members must be logged in to access the NDR and the guidelines.
Entries below are listed alphabetically by common name followed by the scientific name appearing in parentheses.
Host Dictionary Updates
New host additions
None
Modified hosts
None
Deleted hosts*
None
Pest dictionary updates
New pest codes
North American Beaver (Castor canadensis)
Maize striate mosaic (MSMV) (Mastrevirus striatis)
White juniper fungus (Robergea sp./spp.)
Unspecified pathology (Drechslera sp./spp.)
Modified pest codes
Wood decay fungus (Aurantiporus fissilis)
Diplodia tip blight (Sphaeropsis sapinea)
Reniform nematodes (Rotylenchulus sp./spp.)
Dead spot (Ophiosphaerella agrostidis)
Deleted pest codes*
None
*The NPDN does not delete any data. Deletion means that as of the date of the change, that host or pest code is no longer viable and the choice has been eliminated from the NDR host and/or pest dictionary.
