NDR Dictionary Updates

Clarissa Balbalian (Vice Chair, National Data Committee)
The Communicator: Volume 7, Issue 2, March 2026

The following lists document additions, modifications and deletions to the National Data Repository (NDR) Host and Pest dictionaries that were implemented in February 2026. 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

Media (Culture media)
Soil, Nematode, Test Sample (Habitat)
Hawaiian Aralia (Polyscias lydgatei)

Modified hosts

Butterfly Bush (Buddleja sp./spp.)
Smooth Witherod (Viburnum nudum)

Deleted hosts*

None

Pest dictionary updates

New pest codes

Unspecified pathology (Gnomoniopsis sp./spp.)
Nepovirus Group (Nepovirus sp./spp.)
Marques' soft scale (Alecanochiton marquesi)

Modified pest codes

Brown rot (Gnomoniopsis sp./spp.)
Vertebrate damage (Vertebrate damage)
Bird damage (Vertebrate Damage)
Tobacco mosaic Ob-strain (TMV) (Tobacco Mosaic Virus Ob-strain)
Mycosphaerella leaf spot (Neophloeospora maculans)
Unspecified pathology (Microdochium nivale)
Corn tar spot (Microdochium maydis)
Leaf spot (Scolecostigmina maculata)
Stigmina leaf spot (Scolecostigmina palmivora)
Sugarcane; Rice grasshopper (Oxya chinensis)

Deleted pest codes*

Eriophyid gall mite (Aceria sp./spp.)
Parasitic Lice (Order Psocodea)
Spruce sawflies (Superfamily Tenthredinoidea)
Iris rhizome rot (Botrytis convolute)

*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.