Indian hedge mustard
Indian hedge mustard (Sisymbrium orientale)
Indian hedge mustard seedling
(Photo A. Storrie)
Indian hedge mustard (Sisymbrium orientale) is an erect annual. It is branched and grows up to 1 m tall. Young plants form a rosette with deeply lobed, pointed leaves up to 110 mm long. Upper leaves are alternate and spear-shaped. Flowers are pale yellow and 6 to 10 mm long. The pod is 60 to 100 mm long, two-celled, slender and cylindrical, and opens when ripe.
Factors that make Indian hedge mustard a major weed:
- Produces very large numbers of seeds
- Causes problems at harvest
- There are populations resistant to Group B and I herbicides
- The small seeds of Indian hedge mustard can cause grain contamination
Further detail about this weed including integrated weed management tactics that could be considered when developing a management plan can be found in the section on problem weeds in the Integrated Weed Management Manual.
Ecology and biology of common weeds are outlined in section 6 of the Integrated Weed Management Manual.