Feral olive is a large shrub dispersed by birds to become a major environmental weed in parts of south-east of Australia.
The feral olive is a major environmental weed in parts of south-east of Australia. It can outcompete native plants and dominate forest or woodland understorey.
Feral olive is a many-branched evergreen shrub or tree usually growing to 2-10 m high. It can occasionally grow to 15 m. The leaves are up to 7 cm long and 1 cm wide, the lower surface is whitish or silvery. The leaf apex does not have a hooked tip. The flowers are creamy-white, tubular at the base spreading to 4 tiny petals. The fruit is a purplish-black oval-shaped fruit olive up to 3 cm long and 2 cm wide with a single seed.
Feral olive has naturalised in many parts of NSW including the North West, Central West, North Coast, Hunter, Greater Sydney, South East, and Riverina regions.
The seeds are spread by birds and other animals that eat the fruit and spread the seeds in their droppings.
Muyt, A. (2001). Bush invaders of South-East Australia: a guide to the identification and control of environmental weeds found in South-East Australia. RG and FJ Richardson.
PlantNET (The NSW Plant Information Network System). Royal Botanic Gardens and Domain Trust, Sydney. Retrieved 8 August 2022 from https://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=in&name=Olea~europaea~subsp.+europaea
See Using herbicides for more information.
Glyphosate 360 g/L
(Various products)
Rate: 10 mL per 1 L water
Comments: Spot spray (smaller plants less than 1 m) For general weed control in domestic areas (home gardens), commercial, industrial and public service areas, agricultural buildings and other farm situations.
Withholding period: Nil.
Herbicide group: M, Inhibitors of EPSP synthase
Resistance risk: Moderate
Picloram 44.7 g/L + Aminopyralid 4.47 g/L
(Vigilant II ®)
Rate: Undiluted
Comments: Cut stump application: Apply a 3–5 mm layer of gel for stems less than 20 mm. Apply 5 mm layer on stems above 20 mm. Stem inject application for trees: Make a series of cuts 15-20 mm deep around the trunk using an axe or saw. Space cuts evenly with no more than a 20-40 mm gap between them. Apply a 5 mm layer of gel over the lower surface of the cut.
Withholding period: Nil.
Herbicide group: I, Disruptors of plant cell growth (synthetic auxins)
Resistance risk: Moderate
The content provided here is for information purposes only and is taken from the Biosecurity Act 2015 and its subordinate legislation, and the Regional Strategic Weed Management Plans (published by each Local Land Services region in NSW). It describes the state and regional priorities for weeds in New South Wales, Australia.
Area | Duty |
---|---|
All of NSW | General Biosecurity Duty All pest plants are regulated with a general biosecurity duty to prevent, eliminate or minimise any biosecurity risk they may pose. Any person who deals with any plant, who knows (or ought to know) of any biosecurity risk, has a duty to ensure the risk is prevented, eliminated or minimised, so far as is reasonably practicable. |
Reviewed 2021