Gina Darin. Acroptilon repens, a dicot, is a perennial herb that is not native to California; it was introduced from elsewhere and naturalized in the wild. Acroptilon repens (Linnaeus) de Candolle in A. P. de Candolle and ; Acroptilon picris (Pallas ex Willdenow) C. A. Meyer; C. picris Pallas ex Willdenow. Acroptilon repens. In: Fire Effects Information System, [Online]. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences.

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Acroptilon australe Iljin Acroptilon obtusifolium Cass. When polyacetylenes were present in the soil at levels of just 4 parts per million, root-lengths of alfalfa. Dyssodia papposaIsmelia carinata Schousb. This herbicide should be applied carefully to minimize the damage to non-target plants.

US Fish and Wildlife Service, pp.

Thick mulches of straw and manure have suppressed small patches of the weed. Galls can be collected in the fall and placed upon the soil to permit the nematode larvae to emerge from the wet, disintegrating galls and penetrate the young knapweed shoots when acroptioln break through the soil in the spring.


However, based on the results of similar control methods a hypothesis can be developed: List of species Acroptilon repens. Try asking one of our Experts. Yield increases in cereals following control of two perennial weeds in Southern Australia. Melampodium perfoliatum Kunth, historic urban waif.

Rhaponticum repens

Grazing is not a method of control for A. Log In New Account Sitemap.

It will damage most perennial broad-leaved plants and so should be applied carefully to minimize the damage to non-target plants. Russian knapweed does not establish readily in healthy, natural habitats.

Also, Russian knapweed is a strong competitor in disturbed soils and burning may only lead to a larger infestation.

Acroptilon repens Calflora

Allelopathic and competitive interactions with crop plants can reduce yields. In early spring, the infective-stage larvae are activated by moisture, and leave the deteriorating galls. Internet references from unknown authors have been numbered and can be found under the heading Internet references at the end of this document. Element stewardship abstract for Acroptilon repens L.

Weeds on the Web: Fields, roadsides, riverbanks, ditch banks, clearcuts, cultivated ground; m; introduced; Alta. Russian knapweed is a deep-rooted long-lived perennial. New shoots also emerge during the season after rainfall.

Biological Invasions, 14 6: Subanguina picridis is a gall forming nematode native to Asia, and is now established in Colorado, Montana, Oregon, Utah, Washington, and Wyoming. Title Habit Caption Rhaponticum repens Russian knapweed ; habit. Aceoptilon knapweed plants that are found should be destroyed immediately. Terrestrial land-dwelling Invasive Species Profiles. Northwest Science, 69 2: Please consider upgrading your browser to the latest version or installing a new browser.


Welcome This is where you can find research-based information from America’s land-grant universities enabled by eXtension.

Public Outreach and Education Materials. Eric Coombs, Oregon Department of Agriculture, bugwood. Articles with ‘species’ microformats Taxonbars with 20—24 taxon IDs Taxonbars with automatically added basionyms. Seeds germinate over a wide range acoptilon temperatures, from 0.

Acroptilon repens, Russian Knapweed

Russian knapweed Scientific classification Kingdom: Shoots emerge from perennial roots early in spring, shortly after soil temperatures remain above freezing. Biological control agents can place additional stress on Russian knapweed plants.

The root system consists of the original root taprootone to many horizontal roots, and their vertical extensions. Kansas Centaurea repens Russian knapweed Repenx weed.