Crop Protection Online > Pests - Weed biology<br> <sub>Agro-region: Denmark</sub> - Senecio vulgaris L.

Crop Protection Online

19.4 2024

Weed biology
_{Agro-region: Denmark}

Senecio vulgaris L.

Can be mistaken for

Plantago major, which has true leaves with almost unbroken leaf edges.

Tussilago farfara L., which has true leaves with unbroken leaf edges.

Characteristics

Cotyledons
Lancet-shaped with entire leaf margins. Stalked. Smooth surface. Length approx. 6-8 mm.

True leaves:
Inverted egg-shaped with saw-toothed leaf margins. Stalked. Hairy surface. Length approx. 10-15 mm.

Mature plant:
Common Groundsel is a small plant with a 10-30 cm high, erect stem. It is especially known by the black marks on the outside of the flower heads and the somewhat fleshy leaves. The diameter of the flower head is approx. 4 mm. Seed production ability up to approx. 7,000 seeds per plant.

Seed
Rod-shaped, longitudinally ribbed with round cross section. The surface is rough with dense rows of hairs between the ribs. Thousand grain weight approx. 0.3 mm.

Biology

Propagation and dispersal
Only through seeds.

Habit
Summer and winter annual.

Importance

The species can be found in both autumn- and spring-sown crops throughout Denmark, but is especially known from Maize fields, yards and gardens. Common Groundsel causes real yield losses in the crops only at large densities.

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Taxonomy

Compositae.

Names in different languages

Danish :	Brandbæger, alm.
German :	Gemeines Greiskraut
English :	Groundsel
Latin :	Senecio vulgaris L.
Norwegian :	Åkersvineblom
Swedish :	Korsört

Seedling

Early stage

Flower head

Mature plant

Seeds

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Weed biology Agro-region: Denmark