About Widely Prevalent Virus of the United States

The Widely Prevalent Plant Pathogenic Virus List is periodically updated by regional coordinators working in collaboration with plant pathology personnel designated by the state department of agriculture in each state.


A "Widely Prevalent" organism is defined by the WPVL working group as an organism that:

  • is widely distributed in any given five year period in the State where the host plant(s) is grown. It does not have to be encountered every year at every location
  • would raise no new regulatory concerns at the State or Federal level if it was identified


The Widely Prevalent Plant Pathogenic Virus list is made available for the use of plant pathologists, educators, and others interested in viruses. The development of the list for each state relies on the expertise and knowledge of Cooperative Extension plant pathologists, scientific publications, and other information accumulated over a number of years, in collaboration with State Plant Regulatory Officers The list is not necessarily conclusive nor complete, and thus, it should not be used as a source of information for legal purposes. Fungal species may be added or deleted as scientific expertise on distribution of fungal species, taxonomic status, and other conditions change over time.


PLEASE NOTE: a permit is still required in order to bring the organism into your state, even though it may be listed in this database.


The database is used by the Animal Plant Health Inspection Service, Plant Protection Quarantine (APHIS-PPQ) and State Plant Regulatory Officials to develop a list of viral plant pathogens that are common in each state to help expedite the permitting process for obtaining research isolates. The list of pathogens that are candidates for expedited permitting in a given state are available on the APHIS-PPQ Expedited Permit list. Even though a pathogen is on the widely prevalent list, it is NOT necessarily on the expedited permit list. The APHIS-PPQ Expedited Permit list is available on the APHIS website, along with standard permit conditions.


Regional Coordinators

Other Widely Prevalent Sites