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 repens, Russian Knapweed

Bonnie Million, National Park Service, bugwood. Go To Encyclopedia of Life Datasheet Rhaponticum repens Russian knapweed. Canadian Journal of Plant Science, 68 3: It is commonly found in areas near a water source, such as river bottoms, areas that are irrigated, or habitats with past or current soil disturbance. List of species Acroptilon repens. Long-term exposure above safe drinking water levels has the potential to cause liver damage 1. Biological control of Russian knapweed: The petals are There is no single “silver bullet” control method for Russian knapweed.

Wyoming Centaurea repens Russian knapweed Noxious weed.

SEINet Portal Network – Acroptilon repens

Thick mulches of straw and manure have suppressed small patches of the weed. Fish and Wildlife Service species assessment and listing priority assignment form: Weed Science, 48 2: Don’t need the entire report? Risk of Introduction Top of page The risk of introduction is high if lucerne and other crop seeds are not screened gepens the presence of R.


Southern Weed Science Society. It does well in arid areas with only mm of annual rainfall Watson, Discing and or plowing can be an effective method of control on agricultural land.

Rhaponticum repens

Contaminated crop seeds are likely to be responsible for its spread worldwide Groh, ; Watson, ; Maddox et al. National Plant Data Center.

A backpack sprayer or a wick is highly recommended to minimize damage to non-target plants. Acroptilon repens does not appear to reproduce extensively from seed but just one plant may produce 1, seeds per year.

The facultative saprophytic fungus Boeremia exigua has also been assessed for its suitability as a biological control candidate of R. Because of its bitter taste, it is usually avoided by grazing animals, and consequently it tends to spread when more palatable plants are consumed.

It is very difficult to control or eradicate once it becomes established. Infestations reduce yields of desired plants and decrease the production quality of rangelands. Montana Centaurea repens Russian knapweed Category 1 noxious weed.

Distribution of yellow starthistle Centaurea solstitialis and Russian knapweed Centaurea repens. Auxin is a naturally occurring plant hormone but many broadleaved plants exhibit an auxin-overdose response when treated with synthetic-auxin herbicides and in essence die as a result of their own disorganized and out-of-control growth. Discussion View source History.


This page was last modified Geographic subdivisions for Acroptilon repens: The rust fungus Puccinia acroptiliwhich was accidentally introduced into North America Canada before is widespread, but it does not control R. Symptoms include the inability to eat or drink, acroptillon or awkward movement, and spontaneous activity.

Field release of Aulacidea acroptilonica Hymenoptera: In other projects Wikimedia Commons Wikispecies. Manual of vascular plants of northeastern United States and adjacent Canada.

Acroptilon repens

In humans, the EPA has found that acute exposures to picloram could cause weakness, diarrhea, weight loss, and central nervous system damage.

Northwest Science, 69 2: It occurs mostly in alkaline, seasonally wet habitats acroptlon Montana.

Russian knapweed Scientific classification Kingdom: Distribution Reprns Top of page You can pan and zoom the map. Under most conditions, Subanguina picridis needs to overwinter in the soil before it is able to attack its host. Distribution Table Top of page The distribution in this summary table is based on all the information available.

Show All Show Tabs hardheads.