Weed Potential
As a weedSoursob is wide spread in regions with an annual rainfall of over 350mm (14in) and appears on disturbed or degraded land or native grasslands, woodlands and along water courses or roadsides.

The plant first appears in winter and produces bulbils in late winter to spring. In summer the plant dies off and the bulbils are moved through the soil by the contracting tuberous root up to a distance of 200mm (7ľin).

Large infestations may have up to 3000 plants per square metre. Bulbils are also dispersed by water, soil, or animals and spread during physical removal of an infestation. Dense infestations inhibit the regrowth of low growing indigenous flora.

Control methodsinclude physically digging out small clumps in moist soil preferable during the first signs of flowering when the bulbs are exhausted and care should be taken not to disturb the bulbils. Plants may also be sprayed with a non-selective herbicide with follow up spraying over 2 to 5 years.