Invasive Species

Regional Report

Review and Assessment of Programs for Invasive Species Management in the Southwestern Region, 2012 (PDF, 612 kb)

Buffelgrass Control

Aerial Spraying of Herbicide to Control Buffelgrass in Southern Arizona: Efficacy, Non-Target Impacts and Application Recommendations (external site PDF, 288 kb)  

Weed Field Guides

Some plant species pose challenges to land managers in dealing with health of forests and woodlands. A series of field guides is available for weed species in the Southwest. Guides are available in PDF format and accessible HTML format.

Cover image of Malta starthistle management guide Cover Image of Salt Cedar Field Guide
Guides (Listed by species - some link to same document for groups of species)
Common Name Species PDF HTML Format
African rue Peganum harmala PDF, 1.7 mb HTML
Buffelgrass Cenchrus ciliaris PDF, 2.2 mb HTML
Bull thistle Cirsium vulgare PDF, 2.7 mb HTML
Camelthorn Alhagi pesudalhagi PDF, 1.5 mb HTML
Canada thistle Cirsium arvense PDF, 2.4 mb HTML
Cheatgrass Bromus tectorum PDF, 1.5 mb HTML
Dalmatian toadflax Linaria dalmatica PDF, 2.0 mb HTML
Diffuse knapweed Centaurea diffusa PDF, 1.6 mb HTML
Dyer’s woad Isatis tinctoria PDF, 2.3 mb HTML
Fountain grass Pennisetum setaceum PDF, 1.2 mb HTML
Giant reed Arundo donax PDF, 1.9 mb HTML
Jointed goatgrass Aegilops cylindrica PDF, 1.3 mb HTML
Leafy spurge Euphorbia esula PDF, 1.9 mb HTML
Lehmann lovegrass Eragrostis lehmanniana PDF, 2.0 mb HTML
Malta starthistle Centaurea melitensis PDF, 1.7 mb HTML
Meadow knapweed Centaurea pratensis PDF, 1.6 mb HTML
Musk thistle Carduus nutans PDF, 2.7 mb HTML
Perennial pepperweed Lepidium latifolium PDF, 2.5 mb HTML
Plumeless thistle Carduus acanthoides PDF, 2.7 mb HTML
Poison hemlock Conium maculatum PDF, 2.1 mb HTML
Prickly pear Opuntia spp. PDF, 2.2 mb HTML
Red brome Bromus rubens PDF, 1.9 mb HTML
Rush skeletonweed Chondrilla juncea PDF, 2.5 mb HTML
Russian knapweed Rhaponticum repens PDF, 2.4 mb HTML
Russian olive Elaeagnus angustifolia PDF, 2.2 mb HTML
Saltcedar Tamarix spp. PDF, 2.0 mb HTML
Scotch thistle Onopordum acanthium PDF, 2.7 mb HTML
Siberian elm Ulmus pumila PDF, 2.5 mb HTML
Spotted knapweed Centaurea biebersteinii PDF, 1.6 mb HTML
Squarrose knapweed Centaurea virgata PDF, 1.6 mb HTML
Teasel Dipsacus fullonum PDF, 1.4 mb HTML
Tree-of-heaven Ailanthus altissima PDF, 2.7 mb HTML
Weeping lovegrass Eragrostis curvula PDF, 2.0 mb HTML
Whitetop Cardaria draba PDF, 2.2 mb HTML
Yellow starthistle Centaurea solstitialis PDF, 2.5 mb HTML
Yellow toadflax Linaria vulgaris PDF, 2.0 mb HTML


Other Invasive Species

For information on other invasive species, visit the USDA Animal and Plant Health Inspection Service's Hungry Pests site.

Graphic of USDA's invasives website




Invasive Species Contact List

Invasive Species Links

  • PDF READER OffSite Link

    A PDF (portable document format) reader is required to read PDF files. Adobe's Acrobat Reader is available as a free download.

Key Contacts

 Allen White
  R3 Pesticide and
  Invasive Species Specialist