Weed Seed: Erucastrum gallicum (Dog mustard)
Canadian: Occurs across Canada except in NU and YT (Brouillet et al. 2016Footnote 1).
Worldwide: Native to southern and central Europe (USDA-ARS 2016Footnote 2). Widely introduced and naturalized in other parts of Europe, as well as North America, the Bahamas, and Korea (Warwick and Wall 1998Footnote 3, USDA-ARS 2016Footnote 2). In the United States it is abundant in the midwest and sporadic but widespread elsewhere (Warwick and Wall 1998Footnote 3).
Duration of life cycle
Seed or fruit type
- Seed length: 1.0 - 1.5 mm
- Seed width: 0.8 - 1.0 mm
- Seed oval to oblong with a groove between the cotyledons and the seed radicle
- Seed reticulate, with stipples inside of the cells
- Seed reddish-brown
- Reticulations are the same colour as seed surface
Habitat and Crop Association
Cultivated fields, old fields, gardens and lawns, orchards, railway yards, railway lines, ballast, waste ground, roadsides and disturbed areas (FNA 1993+Footnote 4, Warwick and Wall 1998Footnote 3, Darbyshire 2003Footnote 5). Also found in open rangelands, dry grassland areas, shores, beaches, river banks and floodplains (Warwick and Wall 1998Footnote 3). Most often found in sparsely vegetated habitats. A weed of cereal and oilseed crops (Warwick and Wall 1998Footnote 3).
Dog mustard was introduced to North America in the early 1900s and spread across the continent via rail lines and contaminated grain shipments (Warwick and Wall 1998Footnote 3). Dog mustard produces an average of approximately 11,000 seeds per plant (Warwick and Wall 1998Footnote 3).
Wall-rocket (Diplotaxis tenuifolia)
- Wall-rocket seed is a similar size, oval to oblong shape, distinctive radicle and surface reticulation as dog mustard. Some wall-rocket seeds are reddish-brown like dog mustard.
- Wall-rocket is usually greenish-brown with dark cotyledons and the surface reticulations are silvery, while dog mustard has reddish-brown reticulations.
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