Planteværn Online > Skadevoldere - Weed biology<br> <sub>Agro-region: Denmark</sub> - Oil-seed Rape
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30.4 2024 undefined

Weed biology
Agro-region: Denmark

Oil-seed Rape Previous page Next page

Go to identification key for weeds

Can be mistaken for

Charlock, which has densely hairy true leaves.
Wild Radish, which has densely hairy true leaves.
Wild Turnip, which has hairier true leaves.

Characteristics

Cotyledons
Inverted kidney-shaped with entire leaf margins. Stalked. The surface is either smooth or has a few hairs. Length approx. 7-10 mm

True leaves
Inverted egg-shaped with sinuate to toothed leaf margins. Stalked. The surface is either smooth or has a few hairs. Length approx. 20-30 mm.

Mature plant plant
Oil-seed Rape is a vigorous plant with a 60-100 cm high, erect stem. The plant is especially known by its very bluish-green colour. The length of the petals is approx. 10-12 mm. Seed production: Up to approx. 1,500 seeds per plant.

Seed
Ball-shaped. Very finely pitted surface. Thousand grain weight approx. 5.0 g.

Biology

Propagation and dispersal
Only through seeds.

Habit
Summer and winter annual.

Importance

Oil-seed Rape is a frequent volunteer plant in both autumn- and spring-sown crops. In all crops in which it is present as a weed it is an injurious weed, which causes yield losses.

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

Taxonomy

Cruciferae.

Names in different languages

Danish : Raps
German : Raps
English : Oil-seed Rape
Latin : Brassica napus L.
Norwegian : Raps
Swedish : Raps
Oil-seed Rape: Seedling
Seedling
Oil-seed Rape: Early stage
Early stage
Oil-seed Rape: Flower
Flower
Oil-seed Rape: Mature plant
Mature plant
Oil-seed Rape: Seeds
Seeds
 
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