Regional Strategy for the NORTHWEST (DEL NORTE & Humboldt) – 2013
This Regional Strategy can help land managers improve their coordination of invasive plant management at a multi-county scale, while providing the basis for future funding proposals. It is derived from local knowledge and CalWeedMapper’s Management Opportunity Report at calweedmapper.calflora.org. Species were selected from Cal-IPC’s statewide Invasive Plant Inventory, supplemented by regional species of concern. Please submit weed location data to Calflora and alert your WMA and Cal-IPC of new potential wildland invaders in your region. Send questions to or call 510-843-3902.
I. Eradication targets. Land managers will work together to eradicate all populations of these species in the region within five years. These are intended to be integrated into local strategies, if appropriate, without replacing existing local priorities. Species may be removed from the eradication list, pending more information.
SPECIES / COMMON NAME / LINK TO MAP1 / Fallopia japonica (= Polygonum cuspidatum) / Japanese knotweed / CalWeedMapper: Fallopia japonica (= Polygonum cuspidatum)
2 / Fallopia sachalinensis (= Polygonum sachalinense) / Sakhalin knotweed / CalWeedMapper: Fallopia sachalinensis (= Polygonum sachalinense)
3 / Periscaria wallichii (= Polygonum polystachyum) / Himalayan knotweed / Calflora: Persicaria wallichii (= Polygonum polystachyum)
4 / Arundo donax / giant reed / CalWeedMapper: Arundo donax
5 / Lythrum salicaria / purple loosestrife / CalWeedMapper: Lythrum salicaria
6 / Tamarix ramosissima / saltcedar, tamarisk / CalWeedMapper: Tamarix ramosissima
7 / Euphorbia virgata (= Euphorbia esula) / leafy spurge / CalWeedMapper: Euphorbia virgata (= Euphorbia esula)
8 / Chondrilla juncea / rush skeletonweed / CalWeedMapper: Chondrilla juncea
9? / Euphorbia oblongata (a new addition?) / oblong spurge / CalWeedMapper: Euphorbia oblongata
10??? / Geranium lucidum (a new addition?) / shiny geranium
/ shiny geranium / Calflora: Geranium lucidum
II. Surveillance targets. Land managers will learn these species and include them in surveys as early detection targets. If detected, species becomes an eradication target. Regional partners will mobilize to respond rapidly and remove it.
SPECIES / COMMON NAME / LINK TO MAP1 / Tamarix parviflora / smallflower tamarisk / CalWeedMapper: Tamarix parviflora
2 / Carthamus lanatus / woolly distaff thistle / CalWeedMapper: Carthamus lanatus
3 / Brachypodium distachyon / annual false-brome, false brome / CalWeedMapper: Brachypodium distachyon
4 / Alyssum murale, A. corsicum / Oregon yellow tuft / Oregon Department of Agriculture
5 / Onopordum acanthium / Scotch thistle / CalWeedMapper: Onopordum acanthium
6 / Alternanthera philoxeroides / alligator weed / CalWeedMapper: Alternanthera philoxeroides
7 / Hydrilla verticillata / hydrilla / CalWeedMapper: Hydrilla verticillata
8 / Sesbania punicea / red sesbania, scarlet wisteria / CalWeedMapper: Sesbania punicea
9 / Eichhornia crassipes / water hyacinth / CalWeedMapper: Eichhornia crassipes
10 / Dittrichia graveolens / stinkwort / CalWeedMapper: Dittrichia graveolens
11 / Acroptilon repens / Russian knapweed / CalWeedMapper: Acroptilon repens
12 / Carduus nutans / musk thistle / CalWeedMapper: Carduus nutans
13 / Centaurea virgata ssp. squarrosa / squarrose knapweed / CalWeedMapper: Centaurea virgata ssp. squarrosa
14 / Cynara cardunculus / artichoke thistle / CalWeedMapper: Cynara cardunculus
15 / Centaurea calcitrapa / purple starthistle / CalWeedMapper: Centaurea calcitrapa
16 / Cynoglossum officinale / houndstongue / CalWeedMapper: Cynoglossum officinale
17 / Watsonia meriana / bulbil watsonia / CalWeedMapper: Watsonia meriana
18 / Agrostis avenacea / Pacific bentgrass / CalWeedMapper: Agrostis stolonifera
19 / Kochia scoparia / kochia / CalWeedMapper: Kochia scoparia
20 / Lepidium appelianum (= Cardaria pubescens) / hairy whitetop / CalWeedMapper: Lepidium appelianum (= Cardaria pubescens)
III. Outreach species. Choose two to five easily-identifiable species. Engage the public to perform early detection work by searching, mapping and removal/restoration. Encourage local media to showcase these species in conjunction with your region’s eradication successes.
SPECIES / COMMON NAME1
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NEXT STEPS
I. Eradication targets: Make the eradication effort “grant ready” and apply for funding to implement it.
· Train. Consult Northwest region eradication species list on Calflora for photos and information. Print and/or download list to smart phone. Train staff to recognize species.
· Verify “Q” quads. Check for CalWeedMapper “Q” quads, resolve whether the species is present, and edit quad data.
· Map populations. Map populations and upload data to Calflora.
· Estimate funding needed. Use Eradication_Workplan.xls to note the treatment approach and estimate the funding needed for eradication.
II. Surveillance targets: Detect these species immediately if they show up in the region.
· Train. Consult Northwest region surveillance species list on Calflora for photos and information. Print and/or download list to smart phone. Train staff to recognize species.
· Survey. Include these species in survey activities.
· Respond. If species is detected, submit data to Calflora, alert the WMA, and respond to the population as an EDRR target.
III. Outreach species: Build public awareness of early detection targets so the public can report sightings.
· Develop materials. Create outreach materials and distribute to the public.
· Publicize. Use the media to get the message out. Leverage local successes.
· Educate. Integrate information into presentations, such as from Master Gardeners.
IV. MONITOR NEW OCCURRENCES:
· Respond. See new occurrence reports of surveillance and eradication species in your area by accessing the Calflora Observation Hotline set up for your region. Collaborate for rapid response to these new occurrences!
Additionally, you can track new occurrence reports of Cal-IPC Watchlist species and Cal-IPC Inventory species in your region. All Inventory species were evaluated for the region’s strategic plan but the Watchlist species were not, and could become surveillance or eradication targets.
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