Locations within which Ageratina adenophora is naturalised include Australia, southern Europe, Africa, Asia, New Zealand, south-western USA and many. Photo: Bart Wursten Ballantyne Park, Harare. Ageratina adenophora. Photo: Bart Wursten Ballantyne Park, Harare. Ageratina adenophora. Photo: Bart Wursten. A. adenophora has proved to be a very aggressive invasive species in some parts of the world, notably Australia, where it forced some farmers.

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Crofton weedcat weedcatweed, croftonweed, hemp agrimony, Mexican devil, sticky agrimony, sticky eupatorium, sticky snakeroot, white thoroughwort.

Blundell, ; Witt and Luke, Though a number of invasive plant species are noted as having negative health effects via the allergenic nature of their pollen e.

Sheldon Navie habit prior to flowering Photo: Status of the adenophoga, fly ageragina parasities of the fly in versus Impact Top of page Crofton weed reduces crop yield, affects the carrying capacity of grazing lands and restricts movement of stock and machinery.

Social Impact Top of page The social impacts of farmers being forced to abandon their land because of A. US Fish and Wildlife Service, Biological Control Because biological control of Crofton weed was fairly successful in Hawaii, USA, the trypetid gall fly, Procecidochares utilis, was introduced to Queensland, Australia, in Sheldon Navie close-up of seeds Photo: By using this site, you agree to the Terms of Use and Privacy Policy.

A ademophora study of the pamakani plant Eupatorium glandulosum H.

Carmichaelia exsul and Calystegia affinis. Botanical Research Institute Witt, A. This page aheratina last edited on 9 Novemberat Biological control of weeds in India. Sheldon Navie close-up of the relatively broad and almost triangular leaves Photo: It is a declared noxious weed or Class A noxious plant in a number of US states where it is not yet present Adenopuora,indicating its potential risks and impacts, and desire for it not to be introduced.


Long-term effects upon community structure and ecological processes have been inadequately studied.

Hawaiian Ecosystems at Risk Project. It may take several years to become evident but is always fatal. The editors are not aware of records of the presence of A. Notes on Natural Enemies Top of page Natural enemies were surveyed in the native range of the weed in Mexico by Osborne who drew attention to organisms of possible value as biological control agents.

The branched stems are densely covered in sticky i. Afenophora found a range of insects including a tephritid gall fly, a lepidopteran stem borer and a curculionid feeding on the shoot tips.

Click on images to enlarge. Schiedea sarmentosa no common name. The principal differences are that A. Biological control of Eupatorium adenophorum in Queensland. Biological control of pamakani, Eupatorium adenophorum, in Hawaii by a tephritid gall fly, Procecidochares utilis.

Flora of Zimbabwe: Species information: Ageratina adenophora

Views Read Edit View history. The small flower-heads i. Cattle find it unpalatable, aberatina and goats eat it without apparent ill effect if other pasture is present, but horses, eating it readily, die as a result. The distribution in this summary table is based on all the information available.

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The following description is taken from Parsons and Cuthbertson None of these organisms offer any real degree of control individually, but the combined effect has reduced plant vigour Dodd, ; Haseler, ; Cullen and Delfosse, Buds appear in late winter and flowering begins in September.


Risks of introduction are high, as seeds may be a contaminant in a variety of traded products included cereal, stockfeeds, forage seeds, soil, sand and gravel, and may also be imported in mud attached to vehicles, agricultural machinery, livestock or humans themselves. This name was used by Dioscorides for a number of different plants. Accidental Introduction An important means of spread of A. One or more of the features that are needed to show you the maps functionality are not available in the web browser that you are using.

Schiedea hookeri no common name. Habitat Top of page A.

Retrieved from ” https: The tiny tubular florets mm long are white and contain both male and female flower parts i. It is also poisonous to livestock, being particularly toxic to horses. It is considered to be having a serious impact on the World Heritage values of Lord Howe Island and threatening the survival of two endangered plant species on the island i.

Sheldon Navie seedling Photo: The invasion of land in Australia in the s and s was so rapid and so severe that it even led to some farmers abandoning their landholdings. Slash and cultivate infested areas in early spring, using crawler tractors and tandem offset discs where wheeled tractors cannot be employed with safety.

Diversity and Distributions12, These multiple means of introduction mean that many pathways are possible for the accidental importation of A.