Larviciding activity of acroptilon repens extract against. Its natural range extends from turkey throughout central asia to china. Mini data sheet on acroptilon repens eppo global database. Abstracttwo new guaianolides have been isolated from the aerial parts of acroptilon repens. Presented here is summary information about the species acroptilon repens from the global compendium of weeds, and citations of references to this species as a weed. Acroptilon repens common names russian knapweed, hardheads family composites, sunflower flower color pink, rose plant type shrub introduced yes native no weed noxious, yes. Acroptilon repens cenredocuments eppo global database. Our objective was to determine the influence of clopyralid plus 2,4d, glyphosate, and fosamine, at various application rates and timing, on the density and biomass of russian knapweed and desired plant groups growing in association with this invasive weed. Aminopyralid is a new pyridine carboxylic acid herbicide that has activity on russian knapweed at lower use rates than current standard treatments. Russian knapweed is an invasive weed of rangeland, pasture, and natural areas throughout western north america. Native plant community composition and genetic diversity. Tracheophyta magnoliopsida asteraceae acroptilon acroptilon repens. Acroptilon repens asteraceae russian knapweed, creeping knapweed. All structured data from the file and property namespaces is available under the creative commons cc0 license.
Documents about acroptilon repens cenre this website uses cookies our website uses cookies to ensure that we give you the best possible online experience. Sustainable invasive weed management must address treatment effects on desired vegetation. We do not use these to store personal information about you. Acroptilon repens is a plant native to eurasia and introduced worldwide fna 2006. Acroptilon repens asteraceae is one of the most invasive and ecologically threatening weed species in western north america. Unless otherwise noted the images are those of robert l.
The rosette leaves are oblanceolate, pinnately lobed to. Department of agriculture agricultural research service. This plant may be known by one or more common names in different places, and some are listed above. Read evaluation of elemental allelopathy in acroptilon repens l. Allelopathic chemicals can stay in the soil after acroptilon repens has been removed. How to get this dissertations electronic documents. It is a strong competitor in infested areas, often forming dense colonies, and has allelopathic effects on other plants growing nearby. A conservation status rank is not applicable sna because the plant is an exotic nonnative in montana that is not a suitable target for conservation activities. Acroptilon repens, russian knapweed invasive species. Acroptilon repens is an herbaceous perennial that propagates by seeds and vegetative means. It is a wide distributed plant that is native to magnolia,western turkistan, iran, turkey and captain asia and was introduced into america and canada at the beginning of previous centaury. Herbicide effects on density and biomass of russian. Jepson manual treatment photo gallery species profile russian knapweed.
Schedule iii nuisance weeds 3 the following plants are designated as nuisance weeds in saskatchewan. Russian knapweed acroptilon repens control with low. Rybalko chemistry of natural compounds volume 7, pages 262 264 1971cite this article. Stems and leaves are finely arachnoidtomentose becoming glabrous and green with age. This plant and synonyms italicized and indented above can be weedy or invasive according to the authoritative sources noted below. Our objective was to determine density and expanding of a. Life cycle of puccinia acroptili on rhaponticum acroptilon repens. Russian knapweed is an invasive perennial forb that can grow to 3 ft. Phenotypes of two generations of sporobolus airoides seedlings derived from acroptilon repens.
Added in 2000 deleted in 2000 reasons for deletion. In 2000, it was therefore removed from the eppo alert list. The structure of acroptilin a sesquiterpene lactone from acroptilon repens. Institute of the chemistry of plant substances, academy of sciences of the uzbek ssr, tashkent. The objectives of this study were to compare aminopyralid efficacy at the bud to early flower timing and the fall timing with commercial. Acroptilon repens is an herbaceous, invasive plant with entomophilous pollen, while juglans regia which is a tree crop produces anemophilous pollen. Adventitious buds on lateral roots produce erect stems that are thin, openly branched, and 0. Acroptilon repens, an asian invader, has stronger competitive.
The following biogeographic classification systems are presented as a guide to demonstrate where russian knapweed might be found based on reported occurrence. Redirect this redirect does not require a rating on the projects quality scale. Definitions of terms are available in the gcw introduction. A perennial herb naturalised on waste ground at hereford railway station herefs. New shoots arise from buds on the roots, as well as on root fragments spread by cultivation. Pdf russian knapweed rhaponticum repens is a rangeland weed pest in the western united states. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks. It is very difficult to control or eradicate once it becomes established. Evaluating nonnative plants for their impact on biodiversity. Rhaponticum repens, synonym acroptilon repens, with the common name russian knapweed, is a bushy rhizomatous perennial, up to 8 dm tall. Davison forage and alternative crops specialist university of nevada cooperative extension ed smith natural resource specialist university of nevada cooperative extension linda m. Rhaponticum repens in the germplasm resources information network grin, u. Acroptilon repens is a serious weed pest, especially in the western united states.
Acroptilon repens has a welldeveloped root system, which functions as the major means of propagation and spreading. A western region sustainable agriculture, research, and education project contents by jason c. Continuing to use this website means you agree to our use of cookies. We document species richness and abundance of natives in old invasions of acroptilon and cardaria to examine the hypothesis that native species may remain in invasions in. Invasive russian knapweed acroptilon repens creates large patches almost. Usda, ars, germplasm resources information network. The weed is characterized by its extensive root system, relatively low seed production, and persistence. The rosette leaves can be unlobed to very lobed and are 2 to 4 in. Evaluation of elemental allelopathy in acroptilon repens. Pdf first report of leaf blight caused by phoma exigua on. The aim of this study was to evaluate the larvicidal activity of acroptilon repens against third instar larvae of anopheles stephensi, culex pipiens and culex quinquefaciatus. We compared the competitive and allelopathic effects of acroptilon repens on native north american species to effects on related species from. Development of seinet, symbiota, and several of the specimen databases have been supported by national science foundation grants dbi 99832, brc 0237418, dbi 0743827, dbi 0847966 symbiota, and several of the specimen databases have been supported by national science foundation grants dbi. Acroptilon repens is a perennial herbaceous plant of the aster sunflower family.
Pdf life cycle of puccinia acroptili on rhaponticum acroptilon. The structure of acroptilin a sesquiterpene lactone from. Download includes an excel spreadsheet of the attributes, and a pdf explaining the background and nomenclature. Pdf phytotoxic polyacetylenes from roots of russian. Wilson invasive plant ecologist, plant, soil and entomological sciences. Herbicide effects on density and biomass of russian knapweed acroptilon repens and associated plant species1 stephen m. The panel on phytosanitary measures considered that the weed acroptilon repens was not an alert situation.
Acroptilon repens authorship and citation feis abbreviation synonyms nrcs plant code common names taxonomy life form federal legal status other status authorship and citation. Acroptilon repens information from the global compendium. Phenotypes of two generations of sporobolus airoides. It reproduces vigorously from seed and spreads from. Click below on a thumbnail map or name for species profiles. The leaves, flowers and stems were blended to crashed. Russian knapweed, plant and soil on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Influence of an exotic species, acroptilon repens l. Written findings of the washington state noxious weed control board may 1995 scientific name. The record derives from tica data supplied on 20120211 which reports it as a synonym record 598e51f56683422e81e730542d37f177 with original publication details. Russian knapweed or hardheads was formerly classified as centaurea repens.
Invasive russian knapweed acroptilon repens creates large. In the present work we study the chemical composition of the aerial parts of the plant and. Although inventories are more common and more accurate in the year 2000 than in 1988, 50% of these states reported only 50% accuracy, while 31% reported 51 to 75% accuracy, and 2 states reported 75 to 100% accuracy in the 2000 survey. A bioassayguided fractionation of the root extracts of this plant led to the isolation of five polyacetylenic compounds, of which one 5. Evaluation of elemental allelopathy in acroptilon repens l. Centaurea repens, russian knapweed andcardaria draba l. Two guaianolides were isolated, chlorohyssopifolin c 1 l and repin 2 2. Overview appearance rhaponticum repens is a perennial forb that can grow to 3 ft. Files are available under licenses specified on their description page. Chemical constituents and phytotoxic activity of the. Citeseerx document details isaac councill, lee giles, pradeep teregowda. Russian knapweed is known to concentrate zinc zn in upper soil layers, the question of whether.
Acroptilon repens, a dicot, is a perennial herb that is not native to california. Rhaponticum repens, synonym acroptilon repens, with the common name russian knapweed. Young stems are covered with woolly hairs, which rub off in time, giving older stems a darkbrown appearance. Russian knapweed article pdf available in plant and soil 28912 november 2006 with 95 reads. Phytotoxic polyacetylenes from roots of russian knapweed. Citeseerx density and dynamics of acroptilon repens l. Acroptilon repens is a perennial herb up to 1 m tall, with creeping rhizomes and an extensive and longlived network of roots. Dc asteraceae is a perennial herb with erect stems growing to 80 cm in height. You do not have access to any existing collections. Acroptilon repens online atlas of the british and irish.
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