|Scientific Name||Thlaspi arvense L.|
|Common Names||English: Field penny-cress, fanweed, french weed, penny-grass, stinkweed, mithridate mustard; German: Acker-Täschelkraut, Acker-Hellerkraut; French: Herbe aux écus, tabouret des champs; Spanish: Carraspique|
|Description||Annual, sometimes over-wintering, seed propagated weed.|
Young plant forms rosettes. The fruit is almost circular, like a penny coin. Field pennycress smells like garlic when leaves are crushed .
Round-to-oval, short-stemmed, smooth-edged, slightly curled tip.
Individual stems, sharply angled, branching above.
Lower leaves an inverted oval in shape, stemmed, forming a flat rosette on the soil; upper leaves long with an arrow-shaped base, indented or large-toothed.
Small, white flowers in an inflorescence (cluster) which later grows long.
Almost circular, flattened pods with a "wing" all around.
Germination is all year round.
Seeds are brownish-black, grooved, and oval.
Viability Of Seeds
500-2,000 per plant; surface germinator at a depth of up to 1 cm (0.39 inch).
Grain fields, clover, hay fields, grasslands, gardens, roadsides, and waste places.
Prefers slightly acid, humus-rich soils and sandy loams.
Additional Crop Information
T. arvense has low competitive ability, therefore economic weed threshold is high (40 plants per m²; 3.7/sq. ft.). It is a significant agricultural weed which competes keenly with crops for moisture and space, often emerges in high densities and causes remarkable reductions in yield.
Integrated Crop Management
Mechanical weed control methods at early growth stages results in good control of this weed.
Choose directly from Category
Search directly for a particular pest
Search directly for a particular disease
Search directly for a particular weed