|Botanical Name||Zantedeschia aethiopica|
DescriptionTuberous herb. Robust, evergreen, clump-forming to 1.5 m high. Leaves large, leathery and shaped like an arrow head. Distinctive inflorescence or flowering parts are trumpet-shaped and consist of a large white-greenish bract (modified leaf) which enclosed the yellow spike-shaped flower or spadix inside.
Where is it found?Swampy areas and damp wasteland. Scattered throughout. A persistent colony-forming garden escape.
Why is it a problem?Smothers ground layer preventing regeneration of natural flora.
How does it spread?Garden waste is an important infestation source.
How do I get rid of it?
Slash stems and dig out all rhizomes.
Stems and leaves may be left to mulch. Do not mulch or compost rhizomes because they always resprout. Bury rhizomes at a landfill or dry and burn thoroughly.
Spray foliage or slash stems and spray cut stumps. (i) Metsulfuron + Penetrant. Apply from spring to late autumn. Rate - Handgun 25 g Metsulfuron + 100 mls Penetrant/100 litres water. Knapsack 5 g Metsulfuron + 10 mls Penetrant/10 litres water. Mistblower 10 g Metsulfuron + 10 mls Penetrant/10 litres water.
(ii) Glyphosate + Penetrant. Rate - Handgun 2 litres Glyphosate + 200 mls Penetrant/100 litres water. Knapsack 150 mls + 20 mls Penetrant/10 litres water.
Isolate a problem area and systematically eradicate plant from the site. It spreads relatively slowly so the systematic eradication can be possible over quite large areas.
Arum lily, especially the cultivar Green-Goddess, has established in many wetland areas in the Bay of Plenty.
For information on the poisonous properties of Arum lily please refer to Bay of Plenty Regional Council's Fact Sheet on Poisonous Plants.