Tropical soda apple

Alert

Be on the lookout for tropical soda apple and report any sightings immediately.

Reporting options

Native to South America, tropical soda apple is a prickly perennial shrub with yellow fruit. It can be invasive and also host various plant viruses.

Tropical soda apple is a major pest in Florida, where it has invaded at least 500,000ha of land and costs landholders millions of dollars each year in control costs and lost production. Queensland has only a small number of isolated infestations, but the species could become a problem in coastal and subcoastal Queensland. It is a prohibited invasive plant under the Biosecurity Act 2014.

Scientific name

Solanum viarum

Similar species

  • Devil's apple (Solanum capsicoides)
  • Devil's fig (S. torvum)
  • Giant devil's fig (S. chrysotrichum)
  • Apple of Soddom (S. linnaeanum)

Description

  • It is an upright, multi-branched perennial shrub and is 0.5–2m tall.
  • Stems have thorn-like prickles up to 12mm long.
  • Leaves are 10–20cm long and 6–15cm wide. They are covered with short hairs and white prickles.
  • Flowers are white with 5 recurved petals and white to cream-coloured stamens.
  • Immature fruits are smooth and round. They are mottled light and dark green like a watermelon.
  • Mature fruits are yellow and 1–3cm in diameter. The leathery skin surrounds a pale-green, scented pulp, each containing 180–240 seeds.
  • Seeds are pale brown, tear-shaped and 3mm across.

3D model

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Habitat

  • Prefers open, disturbed sites, especially pastures and areas around cattle yards.
  • Prefers coastal, high-rainfall habitats in tropical and subtropical areas.

Distribution

  • First detected in Queensland in November 2010 near Coominya in South East Queensland.
  • Currently a small number of isolated infestations in Queensland.

Life cycle

  • Reproduces from seeds.
  • Flowers in autumn–winter.
  • Fruit sets in winter.

Affected animals

  • Livestock

Impacts

Economic

  • Invades and replaces pasture, including improved pasture.
  • Leaves are unpalatable to livestock (although fruit are readily eaten).
  • Provides an alternative host for at least 6 viruses that affect various vegetables.

How it is spread

  • Seeds are spread primarily by cattle but also by birds, feral pigs, deer, contaminated hay, and water.

Control

Legal requirements

  • Tropical soda apple is a prohibited invasive plant under the Biosecurity Act 2014.
  • You must not:
    • keep it
    • move it
    • give it away
    • sell it
    • release it into the environment.

    If you do any of these, penalties may apply.

  • You must not take any action that is reasonably likely to exacerbate the biosecurity threat posed by tropical soda apple.
  • You must take any action that is reasonably likely to minimise the biosecurity threat posed by tropical soda apple.
  • You must report any sightings immediately using 1 of these methods:

Further information