Wednesday, July 28, 2010
Giant Hogweed
Warnings have been issued for southern Ontario regarding giant hogweed (Heracleum mantegazzianum) aka giant cow parsley. This is a perennial, invasive noxious weed that reaches a height of 5 metres is a public health risk. The sap contains furocoumarin, a chemical that renders skin extremely susceptible to UV exposure resulting in severe burns and blistering (phytophotodermatitis). This can
Labels:
noxious weeds,
perennial
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