|Scientific Name||Descurainia sophia L.|
|Synonyms||Sisymbrium sophia L.|
|Common Names||English: Tansy mustard, flixweed, German: Sophienkraut, French: Sagesse-des-chirurgiens|
|Description||Annual, over-wintering, seed-propagated weed with ramified taproot. The plant is slightly poisonous.|
Much divided leaves, densely pubescent stems, and ascending long fruits.
Elongate, leaf tip obtuse, 3 - 6 mm (0.12 - 0.23 inch) long, short-petiolate, lower part covered with rare, thin hairs.
Erect, often branched above, stretched-ramified.
Plants are 20 -50 cm (7.87 - 19.68 inch) tall.
Alternate, sessile, basal with auricles, bi- tripinnatisect, with lineal- lanceolate lacinules, fine gray or whitish pubescent, linear or broadly ovate.
Bright yellow to whitish.
Peduncles 2-3 times longer than sepals.
Petals(4) pale-greenish-yellow, 1.5 - 2.5 mm (0.059 - 0.098 inch) long, in elongated clusters (racemes).
Late spring - middle of autumn.
Silique to 2.5 cm (0.98 inch) long, 1 mm (0.039 inch) in diameter, many seeded.
Pedicel up to 1.5 cm (0.59 inch) long, filiform.
Germination in spring and autumn.
Viability Of Seeds
Up to 4 years.
110,000 - 770,000 seeds/plant.
Germination depth up to 3 cm ( 1.18 inch).
Waste ground, disturbed sites, roadsides, railroads.
Common on various, especially sandy and light soils.
D. sophia originates from North America and is a troublesome weed in cultivated lands, grain fields, oil seed rape and disturbed areas.
The weed is toxic to livestock.
Integrated Crop Management
Competitive crops and mulching reduce emergence of tansy mustard.
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