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

Crop Protection Online

24.10 2024

Weed biology
_{Agro-region: Denmark}

Aethusa cynapium L.

Can be mistaken for

Fumaria officinalis L., which has somewhat longer dicotyledon leaves.

Characteristics

Cotyledons
Almost lancet-shaped, with entire leaf margins. Stalked. Smooth surface. Length approx. 10 mm.

True leaves
With more or less deep incisions and partings. Stalked. Smooth surface. Length approx. 8-15 mm.

Mature plant
Fool’s Parsley is a medium-sized plant with 30-60 cm long stems. The flowers are arranged in umbellets, which in their turn are arranged in an umbel. Each umbellet has 3 pendent leaves. Seed production: Up to approx. 500 seeds per plant.

Seed
Almost egg-shaped in circumference. Crescent-shaped cross section. The surface has strong veins on the curved side and 2 red oil tubes on the flat side. Thousand grain weight approx. 1.7 g.

Biology

Propagation and dispersal
Only through seeds.

Habit
Summer annual or biennial.

Importance

The species is occasionally found in spring-sown crops in Denmark (East Jutland and the Danish Isles). In West and North Jutland the plant is found infrequently. In Cereal crops and Oil-seed Rape, Fool’s Parsley usually has no major influence on yield. However, the plant can both be troublesome and cause losses in open crops, especially in Beet.

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Taxonomy

Umbelliferae.

Names in different languages

Danish :	Hundepersille
German :	Hundspetersilie
English :	Fool's Parsley
Latin :	Aethusa cynapium L.
Norwegian :	Hundepersille
Swedish :	Vildpersilja

Seedling

Early stage

Flower

Mature plant

Seeds

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Weed biology Agro-region: Denmark