Welcome to the monthly weed post, a 2-page bulletin featuring a noxious weed, interesting research, or a timely issue related to weed management. If you would like to receive the Monthly Weed Post via email, please send an email to jane.mangold@montana.edu

Searchable database of monthly weeds posts! Search by keyword or by topic.


Identifying invasive annual grasses in Montana (March) (video)

How to tell the difference between exotic and native thistles (February)

Hairy cat's ear (January)

Answers to recent Weed Post word scrambles or crossword puzzles:

February 2020



Managing weeds after wildfire (December)

Rabbitsfoot grass (November)

Tree of heaven (October)

White bryony (September)

Narrowleaf hawksbeard (August) 

Dame's rocket (July)

Common bugloss (June)

Cutleaf vipergrass (May)

Field bindweed (April)

Schutter diagnostic lab activities for 2018 (March)

Dyer's woad (February)

Blueweed (January)




Predicting the best sites to use biological control (December) 

Palmer amaranth (November)

Are invasive plant managers reducing viable seed production of hoary alyssum with herbicides? (October)

Noble yarrow (September)

"Montana's Noxious Weeds" now available as electronic flipbook (August)

A perennial problem: Revisiting control methods for Canada thistle (July)

Most popular mobile apps for invasive plant managers (June)

What's up? Buttercup! (May)

White campion and bladder campion (April)

Scentless chamomile (March)

Fragrant waterlily (February)

Montana Noxious Weed Education Campaign highlights from 2017 (January)


Montana realtor online noxious weed training (December)

Herbicide resistance (November)

Yellow and desert alyssum (October)

Modifying seeding date for successful establishment of bluebunch wheatgrass (September)

Common sources of non-target herbicide injury (August)

Roadside revegetation: Native plants and noxious weeds (July)

Common burdock (June)

A systematic review of cheatgrass (Bromus tectorum) control research (May)

Invasive mustards: hoary alyssum, perennial pepperweed, and whitetop (April)

Weed suppressive bacteria for cheatgrass (March)

Musk thistle (February)

Schutter Diagnostic Laboratory 2016 Summary (January)


Common mullein (December)

Bear Trap Wilderness (November)

Economic impacts of noxious weeds on private grazing lands (October)

Conservation Innovation Grant project--Changing weed management (September)

Leafy spurge integrated management monitoring day (August)

Dame's rocket (July)

Spotted knapweed, native forbs, and pollinators (June)

Weed manager-driven local research projects Part II (May)

Weed manager-driven local research projects Part I (April) 

Rush skeletonweed (March)

Tall buttercup seedling growth along a soil moisture gradient (February)

Schutter Diagnostic Laboratory (January)


Montana Noxious Weed Education Campaign (December)

Native parisitoids associated with knapweed biocontrols (November)

Biennial thistles (October)

Parrot feather watermilfoil (September)

Weed impact rankings (August)

Brazilian waterweed (July)

Garlic mustard (June)

Baby's breath (May)

Revegetation of rangeland (April)

Yellowflag iris reproduction (March)

Common buckthorn (February)

Cheatgrass biocontrol (January)


Biocontrol research update (December)

Field scabious (November)

Absinth wormwood (October)

Phragmites (September)

Native and exotic thistles: Who's Jeckyl, who's Hyde? (August)

Weed spread and climate change: the story for Dalmatian toadflax (July)

Bulbous bluegrass (June)

Poison hemlock (May)

Grass identification (April)

Genotyping rush skeletonweed (March)

Black henbane (February)

Medusahead (January)


A brief peek into weed research in Montana (December)

Bees eye view: native versus nonnative plants (November)

Plant identification (October)

Going my way? Weed seeds as hitchhikers (September) 

Ventenata (August)

Knotweed distribution (June)

Knotweed distribution (June)

A glimpse at a few new invaders (May)

Controlling cheatgrass with imazapic on Montana rangeland (April)

Dyer's woad (March)

Hawkweed ID and nomenclature (February)

Hawkweeds (January)


Applying biological control methods for weed management (December)

Dalmatian and yellow toadflax (November)

Weeds and wildfire (October)

Rangeland revegetation revisited (September)

Rush skeletonweed (August)

Tall buttercup (July)

Biological control of leafy spurge, spotted knapweed, and Dalmatian toadflax in MT (June)

Perennial pepperweed (May)

Summary of weed research in Montana (April)

Yellowflag iris (March)

Revegetation of cheatgrass-infested rangelands: size matters! (February)

Weed post year in review (January) 


Western salsify (December)

Flowering rush (November)

White bryony (October)

Knapweed identification (September)

Whitetop (August)

Yellow starthistle (July)

Hoary alyssum (May)

Scotch broom (April)

Blueweed (March)

Knotweed (February)

Eurasian watermilfoil (January)