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

Crop Protection Online

24.4 2024

Weed biology
_{Agro-region: Denmark}

Sinapis arvensis L.

Can be mistaken for

Brassica campestris L, which has more blue-green true leaves.

Brassica napus L., which has almost smooth true leaves.

Raphanus raphanistrum L., which has bigger dicotolydon leaves and true leaves.

Characteristics

Cotyledons
Inverted kidney-shaped with entire leaf margins. Stalked. Smooth surface. Length approx. 7-8 mm.

True leaves
Inverted egg-shaped in outline with more or less deep incisions in the leaf margins. Stalked. Hairy surface. Length approx. 20 mm.

Mature plant
Charlock is a vigorous plant with a 30-60 cm high, erect stem. The stem and leaves have stiff hairs. The colour of the leaves is typically grass-green; by contrast Oil-seed Rape and Wild Turnip have blue-green leaves. The diameter of the flower is approx. 10-15 mm. Seed production: Up to approx. 1,000 seeds per plant.

Seed
Spherical in both cross section and circumference. The surface is finely pitted. Thousand grain weight approx. 1.3 g.

Biology

Propagation and dispersal
Only through seeds.

Habit
Summer annual.

Importance

The species is often found in spring-sown crops throughout Denmark. Even at small densities Charlock is an injurious weed species causing losses in any crop. It is impossible to separate the seeds from those of Oil-seed Rape.

For treatment options, consult 'Herbicides Across'.
For more options, consult 'Main Menu'.

Taxonomy

Cruciferae.

Names in different languages

Danish :	Sennep, ager
German :	Ackersenf
English :	Charlock
Latin :	Sinapis arvensis L.
Norwegian :	Åkersennep
Swedish :	Åkersenap

Seedling

Early stage

Flower

Mature plant

Seeds

Crop Protection Online is published by Department of Agroecology, Aarhus University and SEGES Innovation.
Informations for which license is not needed may be used with reference of source.

E-mail to planteit@seges.dk

Weed biology Agro-region: Denmark