Sudden Oak Death Alert - Update
Gail Ruhl, Senior Plant
Disease Diagnostician/ Interim P&PDL
Director, Purdue University
On March 8, 2004, Claude R. Knighten, Public Affairs Specialist
Plant Protection and Quarantine, reported the confirmation
of Phytophthora ramorum, the fungus-like causal organism
of sudden oak death (SOD) disease on six varieties of camellia
samples taken from Monrovia Nursery, in Azusa, California. Hosts
and associated plants were destroyed.
of July 1, 2004, 18 states have reported positive confirmations
of Phytophthora ramorum, the fungus-like causal agent
of Sudden Oak Death, on nursery stock originating from a large
nursery in southern California. There is important news in
the current update about a confirmation of P. ramorum on
a mature red oak tree located in a 192 acre forested country
park in Nassau County, NY. British Columbia has also confirmed
the presence of P. ramorum on nursery stock shipped
into Canada. On June 23, 2004, five
new hosts were added to the "APHIS list of Hosts and
Associated Plants." A revised host list (August 1, 2005)
can be viewed here.
To prevent further spread of Phytophthora ramorum, on April 22, 2004,
Richard L. Dunkle, Deputy Administrator, PPQ signed a new Amended
Order Restricting Movement of Nursery Stock From California. States can
still choose to enforce their own bans. An amended
order and clarification of
the amended order were also signed. Newly
quarantined counties in California and Oregon were reported on May 17th.
Indiana established an Emergency Quarantine
of California nursery stock susceptible to Sudden Oak Death
on March 30, 2004. (http://www.in.gov/dnr/entomolo/programs/SOD.htm)
A list of states with restrictions for movement of host material
susceptible to Sudden Oak Death from California can be found
at the following link on the CDFA
The quarantine prohibits firms, in Indiana, that have ordered plant genera
known to be susceptible to Sudden Oak Death from any California nursery, from
receiving that material until the California nursery has been inspected and
shown to be free from the Sudden Oak Death pathogen by the USDA APHIS PPQ or
California Department of Food and Agriculture using the federal inspection
If firms have already received plant material from California which includes
one of the regulated genera in the list provided, they must do two things:
1) Remove that material and any intermingled plants from sale, until the DNR
can inspect the material and release it.
2) Contact the DNR at once at let them know that they have nursery stock that
needs to be inspected.
For more information contact:
Indiana Department of Natural Resources
Division of Entomology and Plant Pathology
402 West Washington Street, Room W-290
Indianapolis, IN. 46204-2739
Telephone: 1 (877) 463-6367
Telephone: 1 (317) 232-4120
Facsimile: 1 (317) 232-2649
You can also obtain additional information from
the USDA APHIS Sudden Oak Death Hotline
at: 1 (888) 703-4457
New Host Reports
The information given herein is supplied with the understanding
that no discrimination is intended and no endorsement by the
Purdue University Cooperative Extension Service is implied.
Any person using products listed assumes full responsibility
for their use in accordance with current direction of the manufacturer.
Purdue University is an equal opportunity/equal access institution.
Information listed is valid only for the state of Indiana.