Idaho Weed Awareness Campaign
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Pulling up Puncturevine (Tribulus terrestris)
Helpful insects from the Nez Perce Bio Control Center

Biological Control

The Nez Perce Bio Control Center provides a full service biological weed control program to landowners and managers throughout the state of Idaho and the Pacific Northwest.

Biological control is the intentional use of a living organism to reduce the population of an undesirable pest. The types of biological agents used to control noxious weeds include: Insects, Diseases and Vertebrates, such as goats, sheep and cows.

Biological control agents are selected for their ability to affect different parts of the weed; the flowers, leaves, stems and roots. The most effective biological control programs use a mix of agents, attacking many parts of the weed, to reduce the competitive advantage they have over native species.

Biological controls, by themselves, will not completely eradicate a weed population. They must be combined with other integrated weed management techniques to be successful. Properly tested and approved biological control agents will feed only on their targeted weed. They will not move to, or feed on, any other plant.

Idaho Weed Awareness Campaign BioControl TV Spot


To keep weeds off your land - keep your lands healthy. Maintaining a healthy ecosystem should be the primary objective to keep invaders out. Mechanical methods, such as pulling, should be your first approach. While herbicides work in most circumstances, biological methods should be considered. So how do you know what control method is better to manage the weeds on your lands?

Just click on the name of a weed you want more information on. You will then be given the best control methods available to manage that weed and links to other sources for more education and information.

"When dealing with newly invasive species, our failures are obvious, and our successes are invisible."
–Dr. Rich Old–


IDAHO'S NOXIOUS WEEDS
What are they and how to manage them?

Brazilian Elodea
Black Henbane
Buffalobur
Canada Thistle
Common Crupina
Common Reed (Phragmites)
Curlyleaf Pondweed
Diffuse Knapweed
Dyer's Woad
Eurasian Watermilfoil
Field Bindweed
Flowering Rush
Giant Hogweed
Giant Knotweed
Giant Salvinia
Hoary Alyssum
Hoary Cress (Whitetop)
Houndstongue
Hydrilla
Iberian Starthistle
Japanese Knotweed
Johnsongrass
Jointed Goatgrass
Leafy Spurge
Matgrass
Meadow Hawkweed
Meadow Knapweed
Mediterranean Sage
Milium
Musk Thistle
Orange Hawkweed
Oxeye Daisy
Parrotfeather Milfoil
Perennial Pepperweed
Perennial Sowthistle
Plumeless Thistle
Poison Hemlock
Policeman's Helmet
Puncturevine
Purple Loosestrife
Purple Starthistle
Rush Skeletonweed
Russian Knapweed
Saltcedar
Scotch Broom
Scotch Thistle
Small Bugloss
Spotted Knapweed
Squarrose Knapweed
Syrian Beancaper
Tall Hawkweed
Tansy Ragwort
Variable-Leaf-Milfoil
Vipers Bugloss
Water Chestnut
Water Hyacinth
White Bryony
Yellow Devil Hawkweed
Yellow Flag Iris
Yellow Floating Heart
Yellow Starthistle
Yellow Toadflax

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