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Nursery News
nursery news  
February 2013
About this newsletter
Boxwood blight cleanliness program
Phytophthora ramorum update
Growers Assisted Inspection Program
Crossword puzzle
Please join Listserv, an email notification system
Revised noxious weed quarantine standard
Nursery plant escapee becoming weedy
Quarantine summaries
Helpful links
Holiday and furlough schedule
About this newsletter
Dahlia at nursery, Image courtesy of Lisa Rehms, ODA
updated January 2013

The Nursery Newsletter is a semi-annual to annual publication of the Oregon Department of Agriculture and is intended as an aid to anyone involved in the growing and shipping of nursery plants. Through this bulletin, we hope to provide you with the most current shipping information as well as other topical information related to the nursery industry. If you have any suggestions for topics or articles for the next issue, contact Lisa Rehms via e-mail at lrehms@oda.state.or.us
Horticulturists:  Christy Brown, Debbie Driesner, Dan Hawks, Lisa Rehms, Eric Reusche, Karl Puls, Sherree Lewis, Scott Rose, Dennis Magnello, Gary Garth, Bev Clark, Susan Schouten
Gary McAninch, program supervisor; Jan Hedberg, lead horticulturist; Sue Nash, program assistant; Kim Lawson, office specialist; Melissa Lujan, GAIP auditor
Lisa Rehms and Bev Clark, editors
Boxwood blight cleanliness program
Boxwood blight, Image courtesy of Karl Puls, ODA
By Lisa Rehms, ODA Horticulturist
updated January 2013

The Oregon Department of Agriculture is starting the boxwood blight cleanliness program designed for nurseries that ship boxwood out of state. This program is being initiated to reduce the possibility of introduction and spread of boxwood blight, Calonectria pseudonaviculatum (syn. Cylindrocladium buxicola or  C. pseudonaviculatum), a damaging fungus introduced into the United States in 2011. This is a voluntary program to assist nurseries in providing disease-free boxwood to their customers. The program will utilize both inspections and best management practices that are designed to promote healthy boxwood.

If your nursery is interested in participating in this compliance program, please contact the ODA, Plant Division, Nursery Inspection Program (503-986-4644) or Jan Hedberg to request a boxwood blight compliance agreement form.

Additional information on boxwood blight can be found online at the following sites:


Phytophthora ramorum update
survey for p. ramorum  
Aaron French surveys a nursery for P. ramorum
By Sherree Lewis, ODA horticulturist/SOD survey coordinator and Jan Hedberg, ODA lead horticulturist
updated February 2013

The 2012 Phytophthora ramorum survey season has been completed with the inspection, sampling and testing of host plant material from 588 nursery sites. In addition, horticultural inspection staff completed the inspection of 274 non-host nurseries. Eleven nurseries were found positive in 2012, and one landscape (Gaultheria spp.) as a result of a trace forward inspection from a Washington nursery. Positive plants found were: Camellia, Cornus, Hamamelis, Kalmia, Magnolia, Pieris, Prunus laurocerasus, Rhododendron, and Viburnum.  All eleven nurseries have completed the USDA-APHIS required Confirmed Nursery Protocol.

Late in 2012, the United States Department of Agriculture, Animal and Plant Health Inspection Service (USDA, APHIS) revised the advanced notification requirement for host plants of Phytophthora ramorum. The previous rule required nurseries in Oregon, Washington, and California shipping host plants of P. ramorum from regulated areas to pre-notify regulatory officials in receiving non-regulated states. Effective December 10, 2012, the USDA, APHIS is requiring only nurseries that have been found positive for P. ramorum within the past three years (since 2010) to comply with advanced notification. The regulation remains unchanged in P. ramorum quarantine areas, requiring all nurseries to comply with advanced notification. State contact information can be found at http://www.aphis.usda.gov/plant_health/plant_pest_info/pram/index.shtml.

Nurseries in the affected counties are required to sign an amendment to their already in place signed compliance agreement, acknowledging the notification requirements. All nurseries with valid federal compliance agreements and located in the affected counties were notified of the additional requirements and provided with an amended agreement to sign and return for federal processing. While most nurseries returned the form, some have not done so yet. They have been contacted several times to remind them of the requirement. If the ODA does not have this document on file, it is possible that the P.ramorum certification for the nursery could be rescinded. Please contact the ODA as soon as possible if uncertain of your certification status. (Jan Hedberg, 503-986-4644)

Additional information on SOD regulations:

Growers Assisted Inspection Program
gaip logo  
By Melissa Lujan, Inspection Program Auditor
updated February 2013

GAIP participants continue to practice best management practices (BMPs) for the prevention and spread of Phytophthora spp. in the Oregon nursery industry. This volunteer nurseries use the BMPs to manage Critical Control Points (CCPs) the ODA has deemed a high risk for pathogen introduction. They include plant buy-ins, water management, potting media, used containers, and soil. 2012 marked the first major updates to the program since 2008 with changes to the water management and potting media/soil CCPs.

The updates were due to information gathered from research conducted at the nurseries over the last couple of years.  We found that it was necessary to separate potting media and soil from one another. This is because native soil may be harboring harmful pathogens that pose a risk to container stock when tipped over or splashed by standing water. To prevent this from happening nurseries can add gravel, use raised beds or benches, grade beds, and keep drainage canals clean and free of debris.

Water management requirements were changed to focus on the entire nursery by improving irrigation techniques, using proper plant spacing, preventing overwatering, cleaning up all debris, and fixing all areas of standing water. Previously the nurseries either had to treat or test water sources. These methods did not necessarily keep pathogens from entering water sources.  Being proactive and keeping the nursery clean reduces the environment for pathogens to become established more efficiently. The following table provides more detail about the changes.

If you have further questions about how systems approach practices can help you or are interested in joining the GAIP please contact Melissa Lujan at 503-510-5529 or send an email to mlujan@oda.state.or.us.

Additional sources:

OAN Safe Procurement and Production Manual http://oan.org/associations/4440/files/pdf/SafeProduction.pdf

OSU PhytophthoraOnline Course: Training for Nursery Growers


Crossword puzzle
Nursery Puzzler by Gary Garth, ODA Horticulturist
updated February 2012

 Nursery Puzzler

Please join Listserv, an email notification system
updated January 2013

The Oregon Department of Agriculture (ODA) started an email listserv in 2011, to more rapidly communicate important information to nursery license holders and others interested in the nursery program. Currently, the listserv system is sending out emails to 1869 different addresses, representing about one third of the total licensees. If you haven’t joined the e-mail listserv, and would like to, simply send an e-mail to: NurseryList-subscribe@oda.state.or.us

You will receive an e-mail message confirming your subscription.
Revised noxious weed quarantine standard
Hydrilla, Image courtesy of Vic Ramey, University of Florida
By Bev Clark, ODA Horticulturist
updated February 2012
During the 2009 legislative session, Oregon Revised Statutes pertaining to the Noxious Weed Laws were consolidated and updated in ORS 569-350. Included in this rewrite is new authority for ODA to address noxious weeds as a public nuisance in administrative rule. Over the past year, cooperators and the public were consulted to update the Noxious Weed Quarantine. The process of drafting and developing rule was completed in 2011 and provide more authority for ODA and county noxious weed control programs to address “A” listed noxious weeds under OAR 603-052-1200. Through the administrative rule process, ODA has incorporated new standards. The following is a summary of the updates.

In summary, a quarantine is established for State Listed Noxious Weeds that prohibits the intentional entry into the state and propagation, transportation, purchase or sale within Oregon. The quarantine outlines how “A” and “B” weeds are to be addressed. It also grants new authority to the State Noxious Weed Control Program to enter onto lands for the purpose of carrying out noxious weed control activities, requires mandatory control of “A” listed weeds, and allows for civil penalty to be imposed for violation of the rule.

Control of “A” listed weeds is the highest priority and the primary goal is to prevent their introduction and permanent establishment in Oregon. This is accomplished through exclusion, early detection, and rapid response activities. If introduced, and eradication is not feasible, the secondary goal is containment to prevent widespread establishment.

The goal of “B” weed management is prevention and control of new infestations based on ODA priorities, current distribution, and availability of funds to address such issues. ODA may advise or assist county programs and cooperators with control of “B” weeds. In some cases, “B” listed weeds may be treated in the same manner as “A” weeds when they are found in a part of the state where they are not widely established or are not known to occur.

For more detailed information reference: Quarantine; Noxious Weeds (603-052-1200)
The Oregon noxious weed quarantine list can be found at: http://oregon.gov/ODA/PLANT/WEEDS/lists.shtm

Nursery plant escapee becoming weedy
Yellow archangel
By Bev Clark, ODA Horticulturist
updated February 2012
Another nursery grown plant is threatening to overrun our urban and wildland areas. The culprit of this all too familiar story is Yellow archangel, Lamiastrum galeobdolon. Yellow archangel is native to Europe and Asia and was introduced to the United States as an ornamental plant. It has spread to forest habitats and natural areas through dumping of yard waste or intentional plantings.
Yellow archangel is a fast-growing, herbaceous perennial that spreads by stem fragments, rooting at nodes and by seed. It can escape from garden settings and form dense patches that outcompete native plant species. Yellow archangel can tolerate a wide range of conditions, from full sun to full shade. It is now found in ravines, greenbelts and forested parks throughout the Pacific Northwest.
Lamiastrum galeobdolon has been placed on the watch list in Oregon, and the Oregon Weed Board is considering listing it as a noxious weed. Currently Yellow archangel is listed as a non-regulated Class B noxious weed in King County, Washington. Control is recommended but not required.

Quarantine summaries
updated February 2013

The ODA has certain quarantines or regulations regarding nursery and Christmas tree plant material being exported or imported to and from the state. Regulations of plant material exported out of Oregon to other states is summarized in the export quarantine. The import quarantine provides a summary of Oregon and federal plant quarantines for plant material imported into and within the state.

Helpful links
updated January 2013
Oregon Department of Agriculture

Oregon State University

United States Department of Agriculture, Animal and Plant Health Inspection Serivce

National Plant Board

Pacific Northwest Management Handbooks Online

Holiday and furlough schedule 2013
updated January 2013

January 18, Friday  Furlough
January 21, Monday
 Martin Luther King Day
February 18, Monday
 Presidents Day
​April 19, Friday
​May 24, Friday Furlough
May 27, Monday
 Memorial Day
July 4, Thursday
 Independence Day
September 2, Monday  Labor Day
November 11, Monday
 Veterans Day
November 28, Thursday  Thanksgiving Day
December 25, Tuesday
 Christmas Day