A bioassayguided fractionation of the root extracts of this plant led to the isolation of five polyacetylenic compounds, of which one 5. Acroptilon repens online atlas of the british and irish. Acroptilon repens authorship and citation feis abbreviation synonyms nrcs plant code common names taxonomy life form federal legal status other status authorship and citation. Rhaponticum repens, synonym acroptilon repens, with the common name russian knapweed, is a bushy rhizomatous perennial, up to 8 dm tall. Native plant community composition and genetic diversity.
Russian knapweed is an invasive perennial forb that can grow to 3 ft. Tracheophyta magnoliopsida asteraceae acroptilon acroptilon repens. Pdf life cycle of puccinia acroptili on rhaponticum acroptilon. Mini data sheet on acroptilon repens eppo global database. 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. The objectives of this study were to compare aminopyralid efficacy at the bud to early flower timing and the fall timing with commercial. Herbicide effects on density and biomass of russian. Russian knapweed or hardheads was formerly classified as centaurea repens.
It reproduces vigorously from seed and spreads from. 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. Acroptilon repens, a dicot, is a perennial herb that is not native to california. Russian knapweed is an invasive weed of rangeland, pasture, and natural areas throughout western north america. Larviciding activity of acroptilon repens extract against. Redirect this redirect does not require a rating on the projects quality scale. The record derives from tica data supplied on 20120211 which reports it as a synonym record 598e51f56683422e81e730542d37f177 with original publication details. Invasive russian knapweed acroptilon repens creates large. Russian knapweed, plant and soil on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Rybalko chemistry of natural compounds volume 7, pages 262 264 1971cite this article. The structure of acroptilin a sesquiterpene lactone from acroptilon repens. Unless otherwise noted the images are those of robert l. This redirect is within the scope of wikiproject plants, a collaborative effort to improve the coverage of plants and botany on wikipedia. Download includes an excel spreadsheet of the attributes, and a pdf explaining the background and nomenclature.
Institute of the chemistry of plant substances, academy of sciences of the uzbek ssr, tashkent. Continuing to use this website means you agree to our use of cookies. Russian knapweed is known to concentrate zinc zn in upper soil layers, the question of whether. Pdf first report of leaf blight caused by phoma exigua on. Added in 2000 deleted in 2000 reasons for deletion. In 2000, it was therefore removed from the eppo alert list. Definitions of terms are available in the gcw introduction. Citeseerx document details isaac councill, lee giles, pradeep teregowda. The weed is characterized by its extensive root system, relatively low seed production, and persistence. Acroptilon repens is an herbaceous perennial that propagates by seeds and vegetative means. Jepson manual treatment photo gallery species profile russian knapweed.
Acroptilon repens is a plant native to eurasia and introduced worldwide fna 2006. We do not use these to store personal information about you. The rosette leaves are oblanceolate, pinnately lobed to. Dc asteraceae is a perennial herb with erect stems growing to 80 cm in height. All structured data from the file and property namespaces is available under the creative commons cc0 license. Allelopathic chemicals can stay in the soil after acroptilon repens has been removed. This plant may be known by one or more common names in different places, and some are listed above. Pdf allergenicity of acroptilon repens and juglans regia. Adventitious buds on lateral roots produce erect stems that are thin, openly branched, and 0.
Stems and leaves are finely arachnoidtomentose becoming glabrous and green with age. Acroptilon repens asteraceae russian knapweed, creeping knapweed. We compared the competitive and allelopathic effects of acroptilon repens on native north american species to effects on related species from. Influence of an exotic species, acroptilon repens l. The following biogeographic classification systems are presented as a guide to demonstrate where russian knapweed might be found based on reported occurrence. Acroptilon repens asteraceae is one of the most invasive and ecologically threatening weed species in western north america. Acroptilon repens is a serious weed pest, especially in the western united states. Citeseerx density and dynamics of acroptilon repens l. It is a strong competitor in infested areas, often forming dense colonies, and has allelopathic effects on other plants growing nearby. Overview appearance rhaponticum repens is a perennial forb that can grow to 3 ft. Young stems are covered with woolly hairs, which rub off in time, giving older stems a darkbrown appearance. Acroptilon repens common names russian knapweed, hardheads family composites, sunflower flower color pink, rose plant type shrub introduced yes native no weed noxious, yes. 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.
Written findings of the washington state noxious weed control board may 1995 scientific name. 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. Rhaponticum repens in the germplasm resources information network grin, u. Russian knapweed article pdf available in plant and soil 28912 november 2006 with 95 reads. Davison forage and alternative crops specialist university of nevada cooperative extension ed smith natural resource specialist university of nevada cooperative extension linda m. 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. Phytotoxic polyacetylenes from roots of russian knapweed acroptilon repens l. Gleason, ha, cronquist, a 1963 manual of vascular plants of northeastern. Acroptilon repens cenredocuments eppo global database. Acroptilon repens, an asian invader, has stronger competitive. It is very difficult to control or eradicate once it becomes established.
Click below on a thumbnail map or name for species profiles. Phenotypes of two generations of sporobolus airoides. Documents about acroptilon repens cenre this website uses cookies our website uses cookies to ensure that we give you the best possible online experience. A perennial herb naturalised on waste ground at hereford railway station herefs. Acroptilon repens has a welldeveloped root system, which functions as the major means of propagation and spreading. Department of agriculture agricultural research service.
Acroptilon repens information from the global compendium. The rosette leaves can be unlobed to very lobed and are 2 to 4 in. Schedule iii nuisance weeds 3 the following plants are designated as nuisance weeds in saskatchewan. The roots of acroptilon repens can extend more than 7 meters below the soil surface with 22. Acroptilon repens is a perennial herbaceous plant of the aster sunflower family. Sustainable invasive weed management must address treatment effects on desired vegetation. You do not have access to any existing collections. Usda, ars, germplasm resources information network. Life cycle of puccinia acroptili on rhaponticum acroptilon repens.
In the present work we study the chemical composition of the aerial parts of the plant and. Pdf phytotoxic polyacetylenes from roots of russian. Chemical constituents and phytotoxic activity of the. Files are available under licenses specified on their description page. 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. Its natural range extends from turkey throughout central asia to china. 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. 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.
Invasive russian knapweed acroptilon repens creates large patches almost. Read evaluation of elemental allelopathy in acroptilon repens l. 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. Rhaponticum repens, synonym acroptilon repens, with the common name russian knapweed. Centaurea repens, russian knapweed andcardaria draba l. Russian knapweed acroptilon repens control with low. Phytotoxic polyacetylenes from roots of russian knapweed. How to get this dissertations electronic documents. The panel on phytosanitary measures considered that the weed acroptilon repens was not an alert situation.
New shoots arise from buds on the roots, as well as on root fragments spread by cultivation. Abstracttwo new guaianolides have been isolated from the aerial parts of acroptilon repens. Evaluation of elemental allelopathy in acroptilon repens l. Evaluating nonnative plants for their impact on biodiversity. The leaves, flowers and stems were blended to crashed. The structure of acroptilin a sesquiterpene lactone from. Evaluation of elemental allelopathy in acroptilon repens. Acroptilon repens is an herbaceous, invasive plant with entomophilous pollen, while juglans regia which is a tree crop produces anemophilous pollen. Two guaianolides were isolated, chlorohyssopifolin c 1 l and repin 2 2. Wilson invasive plant ecologist, plant, soil and entomological sciences.
97 44 981 832 1180 548 151 21 561 1368 614 1126 926 1266 597 386 1290 1216 335 906 362 1361 1022 125 990 1420 147 786 1400 913 989 499 1060 778 1442 758 559 1327 629 441 643 139 135 842 1142 170 1426 385