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Cirsium vulgare (spear thistle)
C. vulgare is an invasive weed in many parts of the world, notably Australia, Canada and the USA, and has the potential to compete with many crops...
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Sicyos angulatus (burcucumber)
S. angulatus is characteristically a weed of maize, soyabean and sorghum crops (Anon., 2010). This is the case in its native range...
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Plantago lanceolata (ribwort plantain)
There are little data to suggest that this species is a priority invasive species in its native range: it is principally a weed of arable field...
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Stachytarpheta jamaicensis (Jamaica vervain)
S. jamaicensis is usually a minor weed of cultivation due to frequent soil disturbance but may become serious in unimproved pastures, especially...
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Imperata cylindrica (cogon grass)
I. cylindrica is a serious weed not only in crops but also in natural areas, causing serious economic and environmental damage. The...
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Avena fatua (wild oat)
A. fatua is considered to be among the world's worst agricultural weeds and is still increasing in importance (Holm et al., 1977; van der Puy,...
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Chrysopogon aciculatus (golden false beardgrass)
C. aciculatus is a widespread grass with nuisance value but limited capacity for widespread invasion. It is listed as a noxious weed in Florida,...
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Carduus nutans (nodding thistle)
It is considered a serious pasture weed in parts of New Zealand, Australia, USA, Canada and Argentina. It can also create some problems in arable...
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Setaria viridis (green foxtail)
Holm et al. (1979) list S. viridis as a serious or principal weed in seven countries, including the USA, Canada and Japan, where it occurs in a...
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Mimosa pigra (catclaw mimosa)
M. pigra is a small prickly shrub that infests wetlands and is also an agricultural weed in rice fields in many parts of the old world tropics. In...
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