Family: Oleaceae (Olive Family)
Duration and Habit: Perennial Tree
Tree privet is a fast-growing evergreen tree approximately 25ft (8m.) to 40ft (14m.) in height with a 25ft (8m.) to 35ft (12m.) spread. It has a dense canopy of bending branches composed of glossy green leaves which have narrow, translucent margins, (Gilman & Watson, 1993). Leaves are dark green, with a paler green undersurface. Flowers are produced in large clusters and are small, cream-coloured and strongly scented (Environment B.O.P). After pollination by insects fruits ripen into bunches of small, oblong, 1 cm long, purplish black berries. Both leaves and fruit are poisonous to humans, (South Coast Weeds, Eurobodalla Shire Council).
Ecological Threat: L. lucidum has the potential to replace mid-canopy trees in forests and completely dominate an area of forest or forest fragments if not controlled. Tree privet often displaces native species in regenerating communities and if left undisturbed, may eventually dominate an area of forest. It is widely believed to contribute to allergies and asthma, though it does not produce any wind-blown pollen as the plant is insect-pollinated.
Biology & Spread: Colonize by root sprouts and spread by abundant bird- and other animal-dispersed seeds.
U.S. Habitat: In North America, Ligustrum spp. often grow along roadsides, in old fields and in other disturbed habitats and in a variety of undisturbed natural areas.
U.S. Nativity: Introduced to U.S.
Native Origin: China, Japan, Korea.
U.S. Present: AL, FL, GA, LA, MD, MS, NC, TX
List All Observations of Ligustrum lucidum reported by Citizen Scientists
Physical: Small plants may be hand pulled; older individuals need to be dug out.
Chemical: For overall spray application, the following herbicides are suitable: Glyphosate (e.g. Roundup G2): knapsack: 100ml per 10 litres of water handgun: 1 litre per 100 litres of water NB: The addition of Pulse penetrant at a rate of 100ml per 100 litres water is recommended to improve herbicide uptake. Escort: knapsack: 5g per 10 litres of water handgun: 20g per 100 litres of water NB: The addition of Pulse, Boost or Freeway at 100ml per 100 litres of water will improve herbicide uptake. Tordon Brushkiller: knapsack: 100ml per 10 litres of water handgun: 1 litre per 100 litres of water. The stem cut and inject method is suitable for privet plants with a stem diameter of 50mm or more. Ring bark the base of the stem with downward axe/machete strokes, cutting into the sap wood. Apply herbicide to the point of runoff into each downward cut immediately after cuts have been made. Suitable herbicides and dilution rates for cut and inject treatment are: Glypohosate (e.g. Roundup G2): Use neat (i.e. undiluted) Escort: 20 g (+ 10ml Pulse penetrant) per litre of water Stump treatment Cut plant off about 50mm above ground level. Apply herbicide mixtures to top and sides of the stump. Pulse penetrant will aid uptake of the herbicide. Suitable herbicides and dilution rates for stump treatment of Privet are: Glyphosate: 2 litres (+10ml Pulse) per 10 litres of water Escort: 5g (+10ml Pulse) per 10 litres of water NB: Herbicide must be applied immediately after stumps have been cut. Herbicide is most effective when applied during Privet's active growing season - spring or autumn in fine weather. If using Escort, avoid use over or nearby desirable plants, or in areas where their roots may extend. (Environment B.O.P. 1998).
Auckland Regional Council (ARC) 2002. Auckland Regional Pest Management Strategy 2002-2007.
Global Invasive Species Database (http://www.issg.org/database)
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