Willow

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Salix spp other than S Babylonica S. x calodendron, S. x reichadtil and S. chilensis syn. S. humboldtiana

Description

These are deciduous trees or shrubs, which form large, dense root mats.

Leaves are long and narrow with finely toothed edges.

Flowers its stalks have numerous tiny flowers.

Seeds are small with long, silky hairs.

Habitat it grows along riverbanks and creeks.

Weed characteristic are that it has an aggressive root system in urban environments, which readily damages footpaths and drains. Its roots spread into beds of watercourses, which slows water flow, reduces aeration and causes flooding and erosion.

Dispersal it spreads by fragments of stems or twigs breaking off and growing new roots in water. It is also spread by birds, especially the grey swallow and black willow.

Declaration Details

This species is a Class 1 declared plant under Queensland legislation and most species are Weed of National Significance.

How to act

New infestations must be reported to Biosecurity Queensland on 13 25 23. The plant must be identified and removed by approved officers and have their locations recorded prior to removal. This plant is easy to treat using basal barking, cut stumping or foliar spraying. However, trees should be left for 12 months before removing after treatment as they will readily grow from broken bits of plants. Mechanical removal can also be used but care should be taken to conduct a thorough follow-up as broken bits of plants can reshoot, especially if around waterways.

Refer to Weed Control Methods.

References

Related information

Willow © NQ Dry Tropics 2011
Willow © NQ Dry Tropics 2011

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