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Contact

Physical Address:
E. J. Iddings Agricultural Science Laboratory, Room 10
606 S Rayburn St

Mailing Address:
875 Perimeter Drive MS 2332 Moscow, ID 83844-2332

Phone: 208-885-7982

Fax: 208-885-9046

Email: calspubs@uidaho.edu

Location

Weeds

Black Medic

Black medic ( Medicago lupulina ) is an annual or short-lived perennial from Eurasia. It can be found in lawns, pastures, rights-of-way and other marginal sites. Learn how to manage this...

Broadleaf Plantain (Plantago major L.)

Broadleaf plantain is a hardy perennial weed that thrives in lawns, fields and roadsides and in other areas prone to trampling. Along with a profile description, this Idaho Green Thumb How-To's...

Bull Thistle: Identification and Control

Bull thistle is a biennial, which means it typically takes two growing seasons to complete its life cycle. This video will introduce you to the life cycle of Bull thistle, how to identify it,...

Centrocoris volxemi—A Newly Introduced Idaho Insect

Centrocoris volxemi is an introduced non-native true bug (insects with piercing-sucking mouthparts) that has been expanding its known range in the United States since 2020 and Idaho the year after.

Chemical Weed Control in New Spring-Seeded Alfalfa

Weed management is one of the most important practices in alfalfa production, particularly in new seeding. This bulletin briefly discusses two chemical-based approaches: preemergence or preplant...

Effective Termination of Cover Crops before Planting Cash Crops

Because of legitimate concerns about weed potential, Idaho farmers often hesitate to plant cover crops, even though the practice improves soil health and fertility, among other documented benefits.

Eurasian Watermilfoil

Covers the biology, detection and management of this invasive aquatic plant. Includes illustrations and descriptions of similar species and estimated costs for various control options, including...

Flowering Rush

Flowering Rush is an invasive, aquatic, perennial weed listed as a "noxious" weed by the Idaho State Department of Agriculture (ISDA). This fact sheet provides basic information on identification,...

Italian Ryegrass Management in Inland Pacific Northwest Dryland Cropping Systems

Widespread herbicide resistance in Italian ryegrass makes integrated weed management strategies difficult for this problematic weed. Learn about the multiple control methods and their combination...

Meadow Deathcamas in the Pacific Northwest

Found in all areas of the Pacific Northwest, meadow deathcamas (Toxicoscordion venenosum) is capable of killing livestock whether eaten as forage or in dried hay. Human poisonings have been...

Nightshade: Biology and Control in the Pacific Northwest

Covers nightshade distribution in the Pacific Northwest; identification of hairy, black, cultleaf and bittersweet nightshades; nightshade biology and toxicity; crop damage; and control practices...

Nuez Blanca

Una mala hierba venenosa 'nociva,' la nuez blanca crece rápidamente y puede sofocar y matar a los árboles pequeños y arbustos. Aprenda sus características y cómo identificarla y controlarla en este...

Pacific Poison-oak and Western Poison-ivy: Identification and Management

Pacific poison-oak and western poison-ivy are both native to the Pacific Northwest. All parts of these plants contain urushiol, an oily toxin that can cause an allergic reaction of contact...

Pigweeds: Current and Emerging Weed Threats in the Pacific Northwest

Pigweed is an invasive plant pest usually found in disturbed areas, like farmland and along roadsides and fencelines. Because their aggressiveness can reduce crop yields, this PNW discusses how to...

Puncturevine

With a spiny fruit capable of injuring hooves, feet and vehicle tires, growers from across the spectrum can learn to effectively manage this weed. Authors: Dale K. Whaley, Robert Parker, Rick...

Rush Skeletonweed

Rush skeletonweed is an exotic herbaceous biennial or creeping perennial plant that aggressively infests rangeland, cropland and disturbed areas. Along with explanations of management strategies,...

Russian Olive Trees: Control and Management in the Pacific Northwest

Russian olive trees are fast-growing plants that since the 1950s have become invasive throughout many areas of the Inland Pacific Northwest, particularly in riparian ecosystems. They form...

Spotted Spurge (Chamaesyce maculata; Synonym: Euphorbia maculata)

Spotted spurge is a summer weed that grows close to the ground in sidewalk cracks, roadsides, gardens or drought-stressed lawns. Its presence can be helpful, because it often indicates an...

Western Waterhemlock in the Pacific Northwest

Western waterhemlock ( xCicuta douglasii ) is the most poisonous plant in North America — a piece of root no larger than a walnut can kill a mature cow. Every part of the plant is toxic. To help...

Wild Carrot

An abundant seed producer, wild carrot grows in meadows, pastures, along roadsides and in non-crop areas. A Class B noxious weed in Washington, the pest ruins cultivated carrot seed and possibly is...

Contact

Physical Address:
E. J. Iddings Agricultural Science Laboratory, Room 10
606 S Rayburn St

Mailing Address:
875 Perimeter Drive MS 2332 Moscow, ID 83844-2332

Phone: 208-885-7982

Fax: 208-885-9046

Email: calspubs@uidaho.edu

Location