![]() Forms massive, tall, impenetrable stands, excluding all other species. Fragments and seeds can drift with water movement or animal dispersal and result in new infestations. Why is it a pest Purple loosestrife is a highly aggressive invader of wetlands. ![]() The woody stems are square in cross-section, pink at the base and. It is an invasive species that out-competes many native wetland. Methods for control/eradication by trained personnel include: careful hand-digging for isolated or small populations, repeated mechanical cutting and chemical treatment.Ĭare must be taken with hand digging and cutting to ensure all plant fragments are removed and disposed of. Purple loosestrife is an erect, summer-green perennial herb that grows 1-2 metres tall. Purple Loosestrife, Lythrum salicaria, was introduced into North America in the 1800s.
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