Clarissa Balbalian (Chair, National Data Committee)
The Communicator: Volume 6, Issue 9, September 2025
The following lists document additions, modifications and deletions to the National Data Repository (NDR) Host and Pest dictionaries that were implemented in July. You can view updates to the NPDN host and pest dictionaries any time by logging into NDR clicking on the Dictionaries 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
Blue Lyme Grass (Elymus arenarius)
Pale Indian Plantain (Arnoglossum atriplicifolium)
Spatterdock (Nuphar advena)
Canterbury Bells (Campanula medium)
Jointleaf Rush (Junucs articulatus)
Common comcockle (Agrostemma githago)
Modified hosts
Blue Lyme Grass (Elymus arenarius)
Deleted hosts*
None
Pest dictionary updates
New pest codes
Harvestmen (Order Opiliones)
Mason bee (Osmia sp./spp.)
Fruit rot (Erwinia pyrifoliae)
Modified pest codes
Vine dieback; Leaf spot (Diaporthe sp./spp.)
Fruit rot (Erwinia pyrifoliae)
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.
