Onion weed is a small plant with onion-like leaves and white or pale pink flowers. It is a weed of cereal crops and arid rangelands.
Onion weed is native from southern Europe to India. Annual or biennial to about 70 cm tall. Leaves are onion-like, although it has no onion smell.
Onion weed produces abundant fertile seeds that can germinate most of the year, and this makes it difficult to control. Hardy weed, ignored by stock. Establishes in disturbed situations, favouring alkaline sandy soils. Now widespread and common from coast to arid inland. Weed of cereal crops and a major threat to arid rangelands.
See Using herbicides for more information.
Amitrole 250 g/L + Ammonium thiocyanate 220 g/L
Rate: 1.1 L per 100 L of water
Comments: Active growth before flowering. Repeat treatments will be required.
Withholding period: Nil
Herbicide group: Q, Bleachers: Inhibitors of carotenoid biosynthesis unknown target
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.
|All of NSW||General Biosecurity Duty
All 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.