Lake Tahoe Basin Weeds Coordinating Group - 2007 Annual Report

Lake Tahoe Aquatic Invasive Species Working Group - 2007 Annual Report

4th Edition April 2007
Selected Invasive Weeds of the Central Sierra Nevada - A Field Guide

Invasive Weed Priority List - El Dorado County Invasive Weed Management Group
July 2006

Group 1 - These species are: a) not currently found in El Dorado County, or b) documented as small, eradicable populations, or c) deemed controllable along a defined eastern leading edge to prevent spread into the Sierra Nevada Mountains. Encourage active control/eradication efforts and education in El Dorado County.

Yellow starthistle - control at 3500 ft. elevation and higher (Centaurea solstitialis)
Spotted knapweed (Centaurea maculosa)
Tall whitetop/perennial pepperweed (Lepidium latifolium)
Dalmatian toadflax (Linaria genistifolia ssp. dalmatica)
Oblong spurge (Euphorbia oblongata)
Tamarisk/saltcedar (Tamarix spp.)
Scarlet wisteria/rattlebox (Sesbania punicea)
Purple loosestrife (Lythrum salicaria)
Canada thistle (Cirsium arvense)
Diffuse knapweed (Centaurea diffusa)
Rush skeletonweed - control at 3500 ft. elevation and higher (Chondrilla juncea)
Hoary cress (Cardaria draba)
Lens-podded whitetop (Cardaria chalepensis)

Group 2 - Encourage the management/control of isolated populations of these species to prevent further spread in El Dorado County.

Brooms (Scotch - Cytisus scoparius, French - Genista monspessulana and Spanish - Spartium junceum)
Arundo/Giant reed (Arundo donax)
Fennel (Foeniculum vulgare)

Group 3 - Other species of concern; continue to increase public awareness and encourage control efforts on public and private lands.

Tree of Heaven (Ailanthus altissima)
Himalaya blackberry (Rubus discolor)
Puncture vine (Tribulus terrestris)
Pampasgrass (Cortaderia selloana)
Johnsongrass (Sorghum halepenses)
Yellow sweetclover (Melilotus officinalis (L.) Lam.
White sweetclover (Melilotus alba Medic.)
Medusahead (Taeniatherum caput-medusae)
Goatgrass (Aegilops triuncaialis)
Italian thistle (Carduus pycnocephalus)
Hedge parsley/Beggar's lice/Velcro stickers (Torilis nodosa)
Bull thistle (Cirsium vulgare)
Tocalote (Centaurea melitensis)
Klamathweed (Hypericum perforatum)