Three cornered garlic, Onion weed
|Botanical Name||Allium triquetrum|
DescriptionPerennial clump with fleshy grass-like leaves and small snowdrop-like flowers growing from small bulbs. Clumps 200-500mm high. Both leaves and stalks are triangular in section and give a strong smell of garlic when crushed
Where is it found?Forest and shrubland margins, roadsides, gardens, wasteland, dumps. Common throughout, especially on roadsides.
Why is it a problem?Persistent and troublesome weed forming dense colonises. Clump size can quadruple each season.
How does it spread?Dispersal routes are mainly roadsides and sometimes farm hedges and railway lines. Vectors of dispersal are possibly hoofed animals, and probably graders, road maintenance machines etc. Sources of infestation were probably by dumping of garden rubbish containing bulbs.
How do I get rid of it?
Digging bulbs out is possible for small areas.
Bulbs do not rot down. Do not compost or leave to mulch. Dispose of in land fill.
Glyphosate 10ml/L or Amitrole 16ml/L or Metsulphuron 5gr/100L
Use Glyphosate when spraying around desireable plants, such as in home gardens or orchards as residues from Amitrole and Metsulphuron may be harmful if sprayed or washed to their root zones.
Ensure follow up work is done to prevent re-infestation. Avoid using contaminated metal in track maintenance and eradicate plant from an area prior to roadworks being carried out to avoid spread.
Reputed to taint the milk if eaten by cows.