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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Economic Impact Top of page R. More information about modern web browsers can be found at http: Timing of applications to the late bud and fall growth stage is critical with most acrophilon to achieve good control of knapweed. Russian knapweed is the most commonly used name in North America.
Acroptilon repens, Russian Knapweed
Southern Weed Science Society. Weeds on the Web: Public Outreach and Education Materials. Biological Invasions, 14 6: Russian knapweed is native to Eurasia and was introduced into the United States in the early s. It induces the production of galls on the stems, leaves, and root collars of infected plants causing a reduction in plant growth and seed production. National Plant Data Center. The following spring these larvae usually become infective after at least a month in moist soil.
State agriculture or natural resource departments. The fall search should focus on any late blooming plants that might have regrown from the root system of plants that had been pulled during an earlier search.
Eric Coombs, Oregon Department of Agriculture, bugwood. Acroptilon repens was designated a noxious weed in the Federal Seeds Act of Canada in This plant may be known by one or more common names in different places, and some are listed above. Corollas mm, tubes 6.
Plants should not be allowed to produce seed and root fragments should not be spread to other locations following treatment Zouhar, Notes on Natural Enemies Top of page R. References Top of page Allen EO, Try to extract as much of the root as possible in order to create the greatest amount of stress on the plant. Articles in Archived Acroptioon.
Decisions to be made are based on the conditions at the site, and whether the goal is containment or eradication Sheley et al. Fabaceae Other Triticum spp.
Therefore, many physical or mechanical methods are not highly effective. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location. View Description Dichotomous Key.
Rhaponticum repens – Wikipedia
An effective management program must first control existing infestations, and then promote repopulation by acroptipon plants. This compound can remain in the soil at some level for several years. Lasting control requires an integration of mechanical control, chemical control, biological control, proper land management, and vegetative suppression. Tap roots reach a depth of 2 m in the first year, and m in the second.
Russian Knapweed (Acroptilon repens) ·
Zimmerman  stated similar growth statistics in that the roots of Acroptilon repens can extend horizontally more than 7 meters with It grows in Minnesota, where average annual temperatures are 4. In fact, glyphosate will kill or damage most plants that it contacts. Under most conditions, Subanguina picridis needs to overwinter in the soil before it is able to attack its host. Two or more generations are completed during the growing season, and second-stage larvae become dormant and acrroptilon in the soil.