Pond apple is a hardy tree with yellow-green fruit that can grow in areas that flood with fresh and salty water. It forms very dense thickets affecting native plants and movement of animals and vehicles.
Pond apple is an agricultural and environmental weed that:
Pond apple is a semi-deciduous tree. Leaves on mature trees sometimes turn yellow and fall off in the dry season. Most plants are 3–6 m tall, but they can grow up to 15 m. Pond apple usually have a single trunk with grey bark. Sometimes multiple stems will emerge and fuse to form a single tree trunk. Older plants may have swollen trunks at the base with buttressed roots.
Pond apple looks like some native mangrove species because they have similar leaves and trunks and can grow in the same habitat. The most similar native mangrove species is the grey mangrove (Avicennia marina) Grey mangrove has oppositely arranged leaves, yellow-orange flowers with four petals and smaller fruit (2-3 cm wide). Another distinguishing feature is that pond apple leaves can turn yellow.
There are currently no known infestations of pond apple in New South Wales. In 2013, pond apple was found in a fruit garden on the North Coast. In 2023 a cultivated plants was found in Greater Sydney. These plants have been destroyed.
Pond apple grows in the wet tropics in northern Queensland and has also been found on the Sunshine Coast and in parts of the Northern Territory. It was introduced to Australia as a salt and water-tolerant rootstock for custard apple (Annona reticulata).
Pond apple is native to North, Central and South America and West Africa.
Pond apple grows in tropical and subtropical climates and prefers moist areas in full sun. It tolerates being flooded in either fresh or salt water for weeks but grows poorly in permanently flooded areas. It does not grow well in very shady or very sandy areas. In agricultural areas it grows along fence lines and in farm drains.
It can grow in many natural environments including:
Pond apples produce extremely large quantities of fruit and seeds. Up to 20 million seeds per hectare have been recorded. Fruit fall from the tree when they are ripe. Seeds on the soil surface or just below are highly viable and most sprout within the first 3 months. Less than 3% of seeds remain in the seedbank after 12 months. If fruiting trees are removed there would be no viable seeds left in the soil after 3 years.
Much of the fruit falls into waterways. Both the fruit and seeds can float and most seeds are spread to new sites by flowing water. Flood water and ocean currents can carry seeds long distances. Fruit usually sinks within a few weeks but the seeds can float for over a year. Over a third of seeds are still viable after 12 months of floating in either fresh or saltwater.
Many native and feral animals eat the fleshy fruit. However, only larger animals such as pigs and wallabies can spread the seeds though their dung. Pigs can spread the seeds up to 10 kilometres. Flying foxes have been seen carrying whole fruit.
Storm damage or tree clearing can create gaps in dense tree canopy that can allow pond apple seedlings to grow and invade these open areas preventing native species from recolonising.
Agriculture & Resource Management Council of Australia & New Zealand, Australian & New Zealand Environment & Conservation Council and Forestry Ministers. (2001). Weeds of National Significance Pond Apple (Annona glabra) Strategic Plan. National Weeds Strategy Executive Committee, Launceston.
Queensland Department of Agriculture and Fisheries (2022) Restricted invasive plant Pond apple Annona glabra. Retrieved 13 Janiuary 2023 from https://www.daf.qld.gov.au/__data/assets/pdf_file/0015/76002/pond-apple.pdf
Setter, S. D., Setter, M. J., & Campbell, S. D. (2004). Longevity of pond apple (Annona glabra L.) seeds and implications for management. In Fourteenth Australian Weeds Conference, 551-554.
Setter, S. D., Setter, M. J., Graham, M. F., & Vitelli, J. S. (2008). Buoyancy and germination of pond apple (Annona glabra L.) propagules in fresh and salt water. Weed Management, 140-142.
Setter, S. D., & Patane, K. A. (2011). Dispersal of pond apple (Annona glabra) by rodents, agile wallabies and flying foxes. In 23rd Asian-Pacific Weed Science Society Conference (p. 487).
Vitelli, J., & Madigan, B. (2011). Evaluating the efficacy of the EZ-Ject herbicide system in Queensland, Australia. The Rangeland Journal, 33(3), 299-305.
Please do not attempt to treat or dispose of this weed yourself. Report this plant if you see it anywhere in NSW by calling the helpline listed at the top of this page immediately.
NSW DPI will lead an initial response for the treatment and disposal of the plant to stop it from spreading.
See Using herbicides for more information.
PERMIT 9907 Expires 31/03/2025
Fluroxypyr 200 g/L
(Comet® 200 herbicide)
Rate: 500 mL to 1 L per 100 L water
Comments: Spot spray. Do not treat plants growing in a body of water.
Withholding period: Do not graze failed crops and treated pastures or cut for stock feed for 7 days after application. See label for further information.
Herbicide group: 4 (previously group I), Disruptors of plant cell growth (Auxin mimics)
Resistance risk: Moderate
PERMIT 9907 Expires 31/03/2025
Fluroxypyr 333 g/L
(Starane⢠Advanced)
Rate: 300 to 600 mL per 100 L water
Comments: Spot spray. Do not treat plants growing in a body of water.
Withholding period: Do not graze failed crops and treated pastures or cut for stock food for 7 days after application. See label for more information.
Herbicide group: 4 (previously group I), Disruptors of plant cell growth (Auxin mimics)
Resistance risk: Moderate
PERMIT 9907 Expires 31/03/2025
Glyphosate 360 g/L
(Various products)
Rate: One part product to 50 parts water
Comments: Spot spray
Withholding period: Nil.
Herbicide group: 9 (previously group M), Inhibition of 5-enolpyruvyl shikimate-3 phosphate synthase (EPSP inhibition)
Resistance risk: Moderate
PERMIT 9907 Expires 31/03/2025
Glyphosate 360 g/L
(Various products)
Rate: One part product to 1.5 parts water
Comments: Cut scrape and paint
Withholding period: Nil.
Herbicide group: 9 (previously group M), Inhibition of 5-enolpyruvyl shikimate-3 phosphate synthase (EPSP inhibition)
Resistance risk: Moderate
PERMIT 9907 Expires 31/03/2025
Glyphosate 360 g/L
(Various products)
Rate: One part product to 9 parts water
Comments: Splatter gun
Withholding period: Nil.
Herbicide group: 9 (previously group M), Inhibition of 5-enolpyruvyl shikimate-3 phosphate synthase (EPSP inhibition)
Resistance risk: Moderate
PERMIT 9907 Expires 31/03/2025
Glyphosate 360 g/L
(Various products)
Rate: One part product to 20 parts water
Comments: Wipe onto leaves. Do not treat plants growing in a body of water.
Withholding period: Nil.
Herbicide group: 9 (previously group M), Inhibition of 5-enolpyruvyl shikimate-3 phosphate synthase (EPSP inhibition)
Resistance risk: Moderate
PERMIT 9907 Expires 31/03/2025
Metsulfuron-methyl 600 g/kg
(Various products)
Rate: 10 - 20 g per 100 L water plus surfactant
Comments: Spot spray. Do not treat plants growing in a body of water.
Withholding period: Nil (recommended not to graze for 7 days before treatment and for 7 days after treatment to allow adequate chemical uptake in target weeds).
Herbicide group: 2 (previously group B), Inhibition of acetolactate and/or acetohydroxyacid synthase (ALS, AHAS inhibitors)
Resistance risk: High
PERMIT 9907 Expires 31/03/2025
Metsulfuron-methyl 600 g/kg
(Various products)
Rate: 10 g per 1 L of water plus surfactant
Comments: Wipe onto leaves
Withholding period: Nil (recommended not to graze for 7 days before treatment and for 7 days after treatment to allow adequate chemical uptake in target weeds).
Herbicide group: 2 (previously group B), Inhibition of acetolactate and/or acetohydroxyacid synthase (ALS, AHAS inhibitors)
Resistance risk: High
Fluroxypyr 333 g/L
(Starane⢠Advanced)
Rate: 900 mL per 100 L of diesel
Comments: Basal bark: Plants up to 20 cm basal diameter. Do not treat plants growing in a body of water.
Withholding period: Do not graze failed crops and treated pastures or cut for stock food for 7 days after application. See label for more information.
Herbicide group: 4 (previously group I), Disruptors of plant cell growth (Auxin mimics)
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. |
All of NSW |
Prohibited Matter
A person who deals with prohibited matter or a carrier of prohibited matter is guilty of an offence. A person who becomes aware of or suspects the presence of prohibited matter must immediately notify the Department of Primary Industries |
Reviewed 2023