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Parkinsonia aculeata L. (Leguminosae: Caesalpinoideae) is a thorny leguminous shrub native to the hot and dry regions of North, Central and South America. In Australia, P. aculeata is recognized as one of the 20 worst weeds and considered a weed of national significance due to its impacts on the environment …

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Pompom weed

Host-specific herbivores associated with Campuloclinium macrocephalum Pompom weed, Campuloclinium macrocephalum (Less.) DC. (Asteraceae), is an ornamental perennial herb, native to South and Central America and Mexico, that has become a serious invasive weed in South Africa. Field surveys conducted in Argentina revealed the presence of potential biocontrol agents. Of these, …

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Chromolaena odorata (L.) R.M.King & H.Rob. (Asteraceae: Eupatorieae) is an herbaceous plant native to Neotropical Region (Argentina, Paraguay and Bolivia) that has become a widespread weed in South Africa and other tropical and subtropical regions of the world.  The univoltine stem borer Recchia parvula (Lane) (Coleoptera: Cerambycidae) was selected as …

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Madeira vine

Madeira vine, Anredera cordifolia (Tenore) Steenis (Basellaceae), is a perennial climber native to southern South America (Bolivia, Paraguay, Brazil, Uruguay and Argentina) that has become a serious environmental weed in Australia, South Africa, Hawaii, New Zealand and other Pacific Islands. The Agricultural Research Council, Plant Protection Research Institute, South Africa …

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Water pennyworth

Water pennyworth, Hydrocotyle ranunculoides (Araliaceae), is an aquatic plant native to South America and possibly also North America. It grows in floating patches, up to 40 cm thick, in lentic water bodies. The dense mats impede the penetration of light, navigation, and the normal flow of water, favoring eutrophication, oxygen depletion, …

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Giant salvinia

Giant salvinia is an aquatic fern that is invasive in most tropical and subtropical areas of the world. The aquatic weevil Cyrtobagous salviniae (Coleoptera: Curculionidae) is an effective natural enemy of Salvinia. However, the plant is invading more temperate areas with harsher winters in the US, such that the weevil …

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