|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 elongates.
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
Also on waysides.
T. arvense has low competitive ability, therefore the conomic weed threshold is high (40 plants per m²; 3.7/sq. ft.). Nevertheless, it is a significant agricultural weed which strongly competes with crops for moisture and space, often emerges in high densities and causes remarkable reductions in yield.
Useful non-chemical contribution to Integrated Weed Management
Mechanical methods at early growth stages result in good control of this weed species.
Choose directly from Category
Search directly for a particular pest
Search directly for a particular disease
Search directly for a particular weed