|Botanical Name||Cestrum parqui|
|Origin||Warm temperate South America|
IdentificationPerennial shrub, usually 1 to 2 metres with offensive smelling leaves. Flowers greenish-yellow, tubular, with five small petals, and are borne in loose clusters at the ends of the branches. Flowers fragrant at night, but offensive smelling by day.
HabitatsWaste areas, and stream banks where it has escaped from gardens.
Impact to Biota and EcosystemsGrows in dense masses, crowding out other species. The species is noted for its extreme toxicity to farm animals including cattle, sheep, horses, pigs and poultry. Numerous animals have been killed when they have gained access and browsed plants.
Dispersal Routes, Vectors, Infestation SourcesUsually spread by planting in gardens. Seeds may be spread by birds, or water, and pieces cut roots spread on machinery may establish new colonies.
Practicable with small infestations. Cut down, dig out stumps and roots completely and burn.
Treat stumps with Tordon Brushkiller at 1 part chemical to 20 parts water. Large infestations need to be sprayed with Tordon Brushkiller mixed at the rate of 500 ml to 100 litres of water. Surfactant should be added and repeated applications may be necessary to achieve a complete kill.
Treat as above or contact a Plant Pest Officer for advice.
Stock death resulting from eating cestrum has been reported. For more information on the poisonous properties of Cestrum please refer to Bay of Plenty Regional Council's Fact Sheet on Poisonous Plants.