Changes to the Washington State Noxious Weed List for 2015
The Washington State noxious weed list is updated every year, and all Washington residents can submit proposals to add or remove species, change the class of a listed noxious weed, or to change the designated area in which control is required for a Class B noxious weed. Anyone, including citizens, tribes, organizations, government agencies, and county noxious weed control boards may participate in the listing process by submitting a proposal or by submitting testimony about proposed changes to the noxious weed list. In fact, Washington's open, inclusive listing process is lauded by other states for its encouragement of public participation. Learn more about the listing process here.
The State Noxious Weed Board voted on the following proposed changes to the 2015 noxious weed list at their regular board on Wednesday, November 5, 2014 in Wenatchee. The votes took place after the Board considered testimony received prior to and during a public hearing held the day before. The purpose of the public hearing was to solicit citizen comments and opinions about these proposed rule changes.
All of these approved changes to the noxious weed list take effect January 1, 2015.
Noxious weed additions for 2015:
Ravenna grass, Saccharum ravennae, Class A noxious weed. Ravenna grass is a large, nonnative, perennial, ornamental grass that has been found escaping in eastern Washington in the last couple of years. It produces large basal clumps of leaves that can crowd out native and desirable plant species. In Washington, seeds of Ravenna grass are spreading from ornamental plantings and can successfully germinate in a wide range of habitats, including locations near the Columbia and Yakima Rivers. Just this summer, escaped Ravenna grass plants were also found in Oregon, near the Columbia River, becoming Oregon's first document record. Locations of Ravenna grass are still limited in Washington and by listing it as a Class A noxious weed, eradication is now required throughout the state, thus eliminating the seed source and spread of plants before they become more widespread. Read the Ravenna grass proposal here. View the draft Written Findings here. View additional images of Ravenna grass here.
Pampas grass, Cortaderia selloana, Class C noxious weed. Pampas grass is a large, nonnative, perennial bunch grass, with showy plumes, used in ornamental plantings in Washington. It is a known invasive species in California and is also escaped in Oregon. Last year, escaped populations of pampas grass were discovered in Washington, with the largest infestation having almost 500 plants. Due to its apparent recent spread, its ability to crowd out desirable plant species, and the range of conditions it can establish and survive, listing pampas grass as a Class C noxious weed will increase awareness about the invasiveness of this species as well as promote education on best management practices. The state noxious weed board does not require control of Class C noxious weeds, but adding it to the state noxious weed list provides county weed boards the option to require control. Read the proposal here. View the draft Written Findings here. View images of escaped plants here. View additional images here (External website).
Jubata grass, Cortaderia jubata, Class C noxious weed. Jubata grass is also a large, nonnative, perennial bunchgrass that is occasionally used as an ornamental species. Pampas grass (Cortaderia selloana), which looks very similar, is the showier of the two species and is more often planted in landscapes. Jubata grass is a listed noxious weed in California, with large infestation occurring along the coast. It is also a noxious weed in Oregon and has been documented in Washington. Last year, escaped populations of pampas grass were discovered in Washington. Due to the similarity in appearance of jubata and pampas grass, and that jubata grass is a listed noxious weed in nearby states, jubata grass is proposed for listing as a Class C noxious weed. This listing will increase awareness about jubata grass and promote information on how to control it. Adding jubata grass to the state noxious weed list also provides county noxious weed boards the option to require control. View the draft Written Findings here. View additional jubata grass images here (external link).
Italian arum, Arum italicum, Class C noxious weed. Italian arum is a nonnative, perennial groundcover that was originally introduced as an ornamental plant. While its spread appears to be moderate, once established in the landscape, it is very difficult to control. It has now naturalized in a number of counties in Western Washington and appears to be establishing populations more rapidly as additional infestations are being discovered. Due to it establishing in riparian areas and other habitats, its toxicity, and it being very difficult to control once established, it is listed as a Class C noxious weed to raise awareness, prevent introductions, and promote control. Adding Italian arum to the state noxious weed list also provides county noxious weed boards the option to require control. View the proposal here. View the draft Written Findings here. View additional Italian arum pictures here.
Reclassification of shiny geranium, Geranium lucidum, from a Class A to a Class B noxious weed to be designated everywhere in the state for control except Clark County. Read the proposal here.
Class B designation changes:
- Cowlitz County: undesignated Dalmatian toadflax, knapweeds (meadow, spotted, diffuse), knotweeds (all except Himalayan), yellow archangel.Proposal.
- King County: undesignated wall hawkweed subgenus. Proposal.
- Okanogan County: designated hoary alyssum throughout county. Proposal.
- Corrected hoary alyssum designation for region 4 (in-house)
Updates to scientific names:
- Hoary cress, Cardaria draba to Lepidium draba
- Hairy whitetop, Cardaria pubescens to Lepidium appelianum
- Meadow knapweed, Centaurea jacea x nigra to Centaurea x moncktonii
Other amendments to WAC 16-750:
- Increased State Weed Board officer terms from one year to two years.
New Brochures on Bees and Noxious Weeds, Yellow Archangel, and Garlic Mustard
Three new brochures that are now available on our website's publication page and available in hard copy. Bees and noxious weed control: finding common ground is a new brochure about supporting bees and other pollinators when controlling noxious weeds. Our other new brochures on yellow archangel and garlic mustard cover plant identification, control recommendations, where these plants grow, and how they spread. Please contact us to request hard copies of these and other brochures.
Early Detection Postcards available in Spanish
Our early detection postcards on poison hemlock, garlic mustard and flowering rush are now available in Spanish. They can be found on our Spanish page as well as our publications page. Please contact us to request hard copies of these postcards and our other brochures.
Changes to WSDA's quarantine list, WAC 16-752
On March 12, 2014 the Washington State Department of Agriculture (WSDA) adopted amendments to the quarantine list, chapter 16-752 WAC that:
Adds three species (oriental clematis (Clematis orientalis), French broom (Genista monspessulana), and giant reed (Arundo donax), (except variegated cultivars) to the prohibited plant list; combines five quarantines into a single prohibited plant list; repeals an obsolete quarantine (yellow nutsedge); and adds language that will allow the issuance of compliance agreements for growing or transporting regulated articles.
The quarantine is being amended as a result of a petition submitted by the Washington State Noxious Weed Control Board.
Adoption Date: March 12, 2014; Effective Date: April 12, 2014
Further information and supporting documents can be found here on WSDA's website.
Information on our website about the quarantine list has been updated with these changes and can be found here.
Changes to the 2014 Washington State Noxious Weed List
The Washington State noxious weed list is updated every year, and all Washington residents can submit proposals to add or remove species, change the class of a listed noxious weed, or to change the designated area in which control is required for a Class B noxious weed. The State Noxious Weed Board voted on the following proposed changes to the 2014 noxious weed list at their regular board on Wednesday, November 6, 2013 in Wenatchee. The votes took place after the Board considered testimony received prior to and during a public hearing held the day before.
All of these approved changes to the noxious weed list take effect January 1, 2014.
Lesser celandine, Ficaria verna, 2014 Class B noxious weed. Lesser celandine is an invasive perennial that is naturalizing over a broad geographic range in the U.S. and is spreading in Washington. Originally introduced as an ornamental, the species and its cultivars may still be sold today. Its early emergence and flowering give it an advantage over other ephemeral plants as it competes with our native understory plant communities. There is a limited window of time the plant is above ground for control before it dies back in the summer. Currently, lesser celandine is listed as a noxious weed and quarantined in Oregon and in other states. As a Class B noxious weed, lesser celandine is designated for control by the WSNWCB in Snohomish, Skamania, Stevens, and Pend Oreille counties, and other county weed boards do have the option of requiring landowners to control it at the local level. Read the proposal here. View the written findings here.
Non-native cattail species and hybrids, including Typha angustifolia, Typha domingensis, Typha x glauca, 2014 Class C noxious weed. Non-native Typha species and hybrids are capable of displacing native plants, hybridizing with our native Typha latifolia, altering marsh habitat, and invading managed aquatic systems. Non-native Typha species and hybrids have become invasive in other parts of the country and currently have a limited distribution in Washington, although recorded occurrences are increasing. Control of known populations, while they are still small and more manageable, will help prevent these invasive species from dominating valuable wetland habitat. This Class C listing increases awareness of the invasiveness of these species and hybrids and gives county weed control boards the option of mandatory, local control. Read the proposal here. View the written findings here.
Russian olive, Elaeagnus angustifolia, 2014 Class C noxious weed. Russian olive is a shrub to small tree with painful, thorny stems, fragrant yellow flowers and olive-like fruit. It spreads along waterways and has naturalized along many of our major rivers in the interior western U.S. It can crowd out important native riparian plant communities that provide valuable wildlife habitat. Listed as a noxious weed in many other states, Russian olive is growing and spreading in eastern Washington. As a Class C noxious weed, county noxious weed control boards have the option of selecting Russian olive for mandatory control at the local level and can provide education and management information on proper control methods to protect agricultural lands and native plant communities. Read the proposal here. View the written findings here. View the submitted written testimony here.
Reclassification of buffalobur, Solanum rostratum, from a Class A to a Class C noxious weed. View the submitted written testimony.
Reclassification of yellow-flowered hawkweed species into 2 subgenera. In an effort to simplify the non-native yellow-flowered hawkweeds (Hieracium species) on the noxious weed list, the WSNWCB consolidated the 11 separate listings (10 species and one separate listing for all other non-native hawkweeds) into two Class B listings by subgenus - Pilosella and Hieracium.
Hawkweeds: all nonnative species and hybrids of the Meadow subgenus (Pilosella), including but not limited to: mouseear (Hieracium pilosella), pale (H. lactucella), queen-devil (H. glomeratum), tall (H. piloselloides),whiplash (H. flagellare), yellow (H. caespitosum), and yellow-devil (H. x floribundum)
Hawkweeds: all nonnative species and hybrids of the Wall subgenus (Hieracium), including but not limited to: common (Hieracium lachenalii), European (H. sabaudum), polar (H. atratum), smooth (H. laevigatum), spotted (H. maculatum), and wall (H.murorum)
Approved minor amendments to listed Class B noxious weeds:
Proposals not adopted to the 2014 noxious weed list:
Giant reed, Arundo donax, proposed as a Class B noxious weed. Giant reed, also commonly called Arundo, is a tall perennial, rhizomatous grass that generally grows 20 feet or taller. In riparian areas it can be highly invasive, forming dense monocultures, causing a number of negative impacts including lower biodiversity, excess water consumption, and posing a significant fire risk. Giant reed is also being tested as a potential biofuel crop and other uses due to its high biomass yield. The WSNWCB chose not to list giant reed at this time, since the Washington State Department of Agriculture has already begun rule-making to regulate giant reed. Read the proposal here. View the written findings here. View the submitted written testimony.
Proposal to reinstate 2012 listing language of Japanese eelgrass, Zostera japonica, (i.e. a Class C noxious weed on commercially managed shellfish beds only). Read the proposal here. 2013 Non-native eelgrass: Zostera japonica workshop. Read the 2014 Written Findings here. View the submitted written testimony: part 1, part 2, part 3, part 4, part 5 and addendum.
Weed 'em Out road signs
Weed 'em Out and Weed 'em and Reap road signs are being installed in a number of counties in Washington. Soon ten counties in Washington will have road signs with these messages about noxious weeds. Click here to see one in Clark County, here for one in Thurston County and here for a sign in Kittitas County along I-90. Look for them on a roadside near you!
State Weed Board Members: learn more about us
The Washington State Noxious Weed Control Board is made up of 12 volunteer members, of which 9 are voting members and 3 are scientific advisors. Click here to find out more about our board members interesting backgrounds and what they do. Additional information about the State Noxious Weed Board can be found here.
Mobile phone website
The Washington State Noxious Weed Control Board website has been streamlined for smart phones with the creation of our mobile phone website. This website provides key information from our full website, but is streamlined to provide information faster and in a smart phone-friendly format. You can still go to our full website from your mobile phone if you perfer by clicking on the 'full site' option on the mobile website's homepage. Check out this new mobile website by going to our regular homepage address: www.nwcb.wa.gov from your smart phone.
Updated written findings for hydrilla, fanwort and fragrant water lily
A written findings document is created when a plant is listed as a noxious weed. Three of these documents have been updated, in partnership with the Department of Ecology, for the aquatic noxious weeds hydrilla, Hydrilla verticillata, a Class A noxious weed, fanwort, Cabomba caroliniana, a Class B noxious weed, and fragrant water lily, Nymphaea odorata a class C noxious weed. Written findings for all listed noxious weeds can be found by going to the species detail page and scrolling down to the 'for more information' section.