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

Crop Protection Online

23.4 2024

Weed biology
_{Agro-region: Denmark}

Raphanus raphanistrum L.

Can be mistaken for

Brassica campestris L, which only has inverted kidney-shaped dicotyledon leaves.

Brassica napus L., which only has inverted kidney-shaped dicotyledon leaves.

Sinapis arvensis L., which only has inverted kidney-shaped dicotyledon leaves.

Characteristics

Cotyledons
Inverted kidney- to heart-shaped with entire leaf margins. Stalked. Smooth surface. Length approx. 7-13 mm.

True leaves
With many deep incisions. Stalked. The surface is densely hairy. Length approx. 20-45 mm.

Mature plant
Wild radish is a relatively high plant (30-80 cm) with an erect stem. It is easily recognised by its articulate siliques and its bristly leaves and stems. The length of the yellow petals is approx. 15-20 mm. Seed production: Up to approx. 160 seeds per plant.

Seed
The naked seeds are round to egg-shaped. The surface is finely netted. The seed is often hidden in the hard articulate silique. Thousand grain weight approx. 7.9 g.

Biology

Propagation and dispersal
Only through seeds.

Habit
Summer annual.

Importance

The species is occasionally found in spring-sown crops throughout Denmark, but its distribution is declining. Even at small densities Wild Radish is an injurious weed, which causes quite heavy losses. It is impossible to separate its naked seeds from those of Oil-seed Oil-seed Rape.

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Taxonomy

Cruciferae.

Names in different languages

Danish :	Kiddike
German :	Hederich
English :	Wild Radish
Latin :	Raphanus raphanistrum L.
Norwegian :	Åkerreddik
Swedish :	Åkerrättika

Seedling

Early stage

Flower

Mature plant

Seeds

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Weed biology Agro-region: Denmark