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).
Biological: An investigation of possible biological control agents is under way on La Réunion. (Environment B.O.P. 1998)
Please see 'The Nature Conservancy's' Stewardship Abstract for detailed information on control methods.
Location Specific Management Information
Hawke's Bay Region (North Island)
The Hawke's Bay Regional Council aims to prevent the spread of privet and reduce the plant density of known infestations in urban areas by 25% by 2006. Privet is designated as a "total control plant pest" throughout the urban zone of Hawke’s Bay. Occupiers are responsible for the control of Privet on their land. They are also responsible for meeting the costs of control. Control may be carried out under a programme approved by Hawke’s Bay Regional Council. Where an occupier does not adhere to the approved management programme, an authorised person may issue directions for the control or eradication of Privet under section 122 of the Biosecurity Act. On default, Hawke’s Bay Regional Council may carry out work and recover the costs from the occupier under sections 128 and 129 of the Biosecurity Act. In the absence of an approved management programme, the occupier must manage privet in accordance with the Strategy Rule. Hawke’s Bay Regional Council will, at its discretion, assist land occupiers to control privet on rateable land.
Please see the Hawkes Bay Regional Council: Pest management Strategy Part II for defintions of pest designation.
L. lucidum is included in the First Schedule of the National Pest Plant Accord. All plants on the list are designated as Unwanted Organisms, and are banned from sale, propagation and distribution throughout New
Zealand. Please see National Pest Plant Accord for the complete list.
Waikato Region (North Island)
Ligustrum spp. (Chinese and tree privet) are classified as “Containment Plant Pests” by Environment Waikato, which means that land occupiers are responsible for controlling it under Strategy rules. Environment Waikato monitors all these species and will provide information and advice when required.
Please see definitions for hierarchy of pest designations.
1. Environment B.O.P. 1998. Plant Pests Control Fact Sheet PP10/98. Privet. Environment B-O-P. 2p.
Summary: Management information.
Available from: http://www.landcare.org.nz/biodiversity/Reference_v.asp?ReferenceID=685 [Accessed 25 February 2003]
2. Environment Waikato. 2002. Privet (Ligustrum spp.)
3. Haley, N. 1997. Weeds in New Zealand.
Summary: General information on distribution, management, description and dispersal.
Available from: http://www.boprc.govt.nz/green/weed101.htm [Accessed 25 February 2003]
4. National Pest Plant Accord, 2001. Biosecurity New Zealand.
Summary: The National Pest Plant Accord is a cooperative agreement between regional councils and government departments with biosecurity responsibilities. Under the accord, regional councils will undertake surveillance to prevent the commercial sale and/or distribution of an agreed list of pest plants.
Available from: http://www.biosecurity.govt.nz/pests-diseases/plants/accord.htm [Accessed 11 August 2005]
7. South Coast Weeds. Eurobodalla Shire Council.
Summary: Description, habitats, dispersal, management information, and look-alike plants.
Available from: http://www.esc.nsw.gov.au/Weeds/Sheets/trees/T%20Privets.htm [Accessed 25 February 2003]
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