pg . 26
NQ DRY TROPICS WEED FREE
WILLOW 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 characteristics 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 .
WILLOW
TREES
BIOSECURITY MATTER
Restricted . This species is Category 3 Restricted matter under Queensland Legislation . This species is also listed a Weed of National Significance ( WONS )
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 .