Neem

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Azadirachta indica

Description

This large perennial tree can reach 35 metres in height. Leaves are compound, with 20-30 asymmetrical serrated leaves. Leaves are very shiny compared to the similar native white cedar.

Flowers are small and white 5 to 6 millimetres wide and are born in large sprays of 150 -250 flowers.

Fruits are smooth, yellow, oval or round in shape 1.5 to 2.5 centimetres long.

Habitat is often found along watercourses, but significantly invades dry rainforest communities and gardens. It is extremely hardy and fast growing.

Weed characteristics the very large size of this plant and its abundance results in this plant dominating and out competing native plants, especially riparian vegetation. Although planted for its insecticidal properties, this is rapidly becoming one of the worst woody weeds in coastal tropical areas. Fruit are toxic to humans but harmless to birds.

Dispersal is mostly by birds, and water is also significant.

Declaration Details

This is not a declared plant under Queensland legislation, but its control is recommended.

How to act

It is important to control mature trees to prevent seed spread. Cut stump or basal barking mature plants is recommended. Young plants can be hand pulled or foliar sprayed with a broad leaf selective herbicide. Ongoing monitoring and control of emergent seedlings is important for effective control.

Refer to Weed Control Methods.

References

Related information

Neem Tree © NQ Dry Tropics
Neem Tree © NQ Dry Tropics
Neem Leaves © NQ Dry Tropics
Neem Leaves © NQ Dry Tropics
Neem © NQ Dry Tropics 2011
Neem © NQ Dry Tropics 2011

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