Planteværn Online > Skadevoldere - Weed biology<br> <sub>Agro-region: Denmark</sub> - Loose Silky-bent

Crop Protection Online

2.12 2024

Weed biology
_{Agro-region: Denmark}

Loose Silky-bent

Can be mistaken for

Annual Meadow-grass, which has markedly boat-shaped leaf-tips.

Characteristics

Early stages
Rolled vernation. The leaves are dull, rough and slender. No dentation. The ligule is somewhat frayed and very long, up to approx. 7 mm.

Mature plant
Loose Silky-bent is a large plant with 40-80 cm high, erect straws. The small one-flowered spikelets (length approx. 2.5-3 mm) are joined in a large pyramidal panicle. Each spikelet has one 5-10 mm long awn. Seed production: Up to approx. 5,000 seeds per plant.

Seed
Lancet-shaped with a very long, thin awn. Kidney-shaped cross section. The bract is strongly domed and short, sparsely barbate on the upper part, but with fine hairy Bristles at the base. Very thin and short rachilla. Thousand grain weight approx. 0.1 g.

Biology

Propagation and dispersal
Only through seeds.

Habit
Winter annual.

Importance

The species can be found on all types of soil. It is mainly found in autumn-sown crops, where it can cause severe losses at large densities. As Loose Silky-bent can be propagated very quickly in crop rotations with a large share of winter crops, it must be considered a very injurious weed.

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

Taxonomy

Gramineae.

Names in different languages

Danish :	Vindaks
German :	Gemeiner Windhalm
English :	Loose Silky-bent
Latin :	Apera spica-venti
Norwegian :	Åkerkvein
Swedish :	Åkerven

Very early stage

Early stage

Ligule

Flowering spikelets

Mature plant

Seeds

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Weed biology Agro-region: Denmark