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Salvinia (Salvinia molesta) may block drains and irrigation
channels.
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Some weeds have an unattractive appearance (eg. Panicum spp.)
and may put off a prospective buyer. Weeds may also block drains, ditches
and irrigation channels (eg. water hyacinth,
Eichhornia crassipes) as well as cover road verges and railway
lines (eg. many grasses). Such properties of weeds will lower the value
of the land.
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