Planteværn Online > Skadevoldere - Weed biology<br> <sub>Agro-region: Denmark</sub> - Creeping Thistle

Crop Protection Online

25.4 2024

Weed biology
_{Agro-region: Denmark}

Creeping Thistle

Can be mistaken for

Characteristics

Cotyledons
Oval with entire leaf margins. Unstalked. Smooth surface. Length approx. 8-12 mm.

True leaves
Oblong to oval outline with spiny leaf margins. Unstalked. Hairy surface. Length approx. 15-20 mm. The first true leaves of plants that are germinated from budding roots resemble the true leaves of young seedlings.

Mature plant
Creeping Thistle is a vigorous plant with 50-130 cm high, erect stems. It is especially known by the prickly spines on the leaves. The diameter of the flower head is approx. 15-25 mm. Seed production: Up to approx. 200 seeds per female flower head.

Seed
Asymmetrically pitcher-shaped with oval cross section. The broadest end with a collar and a pin-shaped remnant of the style. The surface is slightly ribbed and longitudinally grooved. Thousand grain weight approx. 1.2 g.

Biology

Propagation and dispersal
Through seeds and budding roots.

Habit
Perennial.

Importance

Creeping Thistle is common throughout Denmark in all crops. Only the vegetative stage of the plant is of influence as a weed, but at this stage the plant can be very troublesome and cause heavy losses.

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

Taxonomy

Compositae.

Names in different languages

Danish :	Tidsel, ager
German :	Ackerkratzdistel
English :	Creeping Thistle
Latin :	Cirsium arvense
Norwegian :	Åkertistel
Swedish :	Åkertistel

Seedling

Early stage

Vegetatively reproduced

Flower head

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