Sinapis alba* (White mustard)

Also known as Brassica hirta.  Most often used as a green manure crop in sugar beet and potato crop rotations. When plowed-down, the plant’s naturally occurring chemicals act as a natural soil fumigant to manage and control soil-borne diseases such as potato verticillium, common root rot and soil nematodes, reducing the need to apply commercial fumigants. When used as a green manure, White mustard can also suppress weed seed germination and improve soil structure and water infiltration by adding nitrogen and organic matter to the soil. Requires water throughout its growing season. Winterkills easily.

area of adaptation

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Family: Brassicaceae

Duration: Annual

Growth Habit: Forb/herb

Native Status: Introduced

Growth Form:

Mature Height:  36-60 in.

Bloom Color: Yellow

Bloom Period: dependent on planting date

Annual Precipitation:  in.

Drought Tolerance:

Shade Tolerance:

Nitrogen fixation: None

Bloat: Non-bloat


Coarse Texture:

Medium Texture:

Fine Texture:

Salinity Tolerance:

CaCO3 Tolerance: 

pH Range:


Seeds per Pound:

Seeding Rate:  7 lbs/acre

Season: Spring/Fall

Days to Germination: 3-5


Martigena - Developed for suppression of nematodes in sugar beet crops. In the Pacific Northwest it is also heavily used in potato rotations and for the control of verticillium, rhizoctonia and suppression of common root rot. Martigena has also been shown to have a substantial effect on reducing weed emergence in subsequent crop years.