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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Seedlings grow rapidly and are fully established and able to regenerate from the crown, if damaged, within 8 weeks of germination. Eupatorium weed species in Australia. Ageratina adenophora reproduces by seeds which are easily dispersed by wind and float on water.

This species appears on several local environmental weed lists in the Sydney area e. If prevention is no longer possible, it is best to treat the weed infestations when they are small to prevent them from establishing early detection and rapid response. Royal Botanic Gardens Sydney, Diversity and Distributions12, They are followed by a small brown seed with a white feathery ‘parachute’. Ageratina adenophora Asteraceae new species to the Italian alien flora and observations on its environmental threats.

Slash and cultivate infested areas in early spring, using crawler tractors and tandem offset discs where wheeled tractors cannot be employed with safety.

Ageratina adenophora Calflora

The distribution of Eupatorium adenophorum Spreng. Social Impact Top of page The social impacts of farmers being forced to abandon their land because of A. Crofton weed is also attacked by an exotic fungus, Cercospora eupatorii which is thought to have been introduced accidentally with P. Seed may also be transported on animals and in soil.


For further information on the biology of A. It also thrives in damp areas such as adneophora margins, drainage lines, gullies and in clearings in wetter forests. Ustilaginales is considered effective. Originally grown as an ornamental plantit adenphora become invasive into farmland and bushland worldwide. In other projects Wikimedia Commons Wikispecies. Biological control of agerayina in India.

The status of insects introduced for the biological control of weeds in Queensland.

It produces numerous upright erect stems from a woody rootstock. Phyllostegia mollis no common name.

Crofton weed Ageratina adenophora is also a weed of particular concern on Lord Howe Island. The principal differences are that A.

Notes on Taxonomy and Nomenclature Top of page Ageratina combines the genus Ageratum with the suffix ‘ina’, meaning ‘pertaining to’, suggesting that the two genera are related; ‘adenophora’ is a combination of the Greek ‘aden’ a glandand ‘phoros’ meaning ‘bearing’ which refers to the oil-producing glands in the leaves.

A tephritid stem galler, Procecidochares utilis has been introduced to control A. Cattle find it unpalatable, sheep and goats eat it without apparent ill effect if other pasture is present, but horses, eating it readily, die as a result. It has caused great economic loss in agriculture in southwestern China, and is threatening the native biodiversity there.

Flora of Zimbabwe: Species information: Ageratina adenophora

Ageratina adenophora is quite similar to Chromolaena odorata Chromolaena and Gymnocoronis spilanthoides Senegal tea plant. Distribution Top of page The native range of A. Sheldon Navie the branched flower clusters at the tips of the stems Photo: A complete guide to declared weeds and invaders in South Africa. Biological control of pamakani, Eupatorium adenophorum, in Hawaii by a tephritid gall fly, Procecidochares utilis. Techniques for xylitol production from the stem of Eupatorium adenophorum Spreng by microorganism fermentation.


It is toxic to horses, who develop respiratory disease after eating it. Click on images to enlarge.

It grows in large dense clumps and will eventually out-compete all other plants in an adsnophora, choking out native vegetation and forming a monoculture. Sheldon Navie infestation Photo: The tiny tubular florets mm long are white and contain both male and female flower parts they are bisexual. When several references are cited, they may give conflicting information on the status.

Scientific name

Journal of Plant Resources and Environment, 8 1: It prefers wetter pastures e. CaliforniaFrench Polynesia, Fiji and Hawaii. US Fish and Wildlife Service, d. Sheldon Navie close-up of seeds Photo: It is most common in northern New South Wales, but is also relatively common along the central coast and in the northern parts of the south ageratian.