Planteværn Online > Skadevoldere - Weed biology<br> <sub>Agro-region: Denmark</sub> - Soft Brome
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18.4 2024 undefined

Weed biology
Agro-region: Denmark

Soft Brome Previous page Next page

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Can be mistaken for

Barley, volunteers, which does not have fused leaf sheaths.
Barren Brome, which has longer ligules with frayed edges.
Oat, volunteers, which does not have fused leaf sheaths.
Rye, volunteer, which does not have fused leaf sheaths.
Spring Wild-oat, which has patent hairs on the leaf edge.
Wheat, volunteers, which does not have fused leaf sheaths.

Characteristics

Early stages
The vernation is convolute. Limp, soft-haired leaves with distinctly 3-veined top- and underside. No dentation. The leaf sheath is soft-haired and fused (closed) to above the middle. The ligule is short, approx. 2 mm long and almost entire.

Mature plant
Soft Brome is a medium-sized plant with 10-40 cm high, ascending or erect stems. The spikelets are grouped in a panicle with erect top branches. The plant is soft-haired everywhere and feels soft to the touch, hence the name. Seed production: Up to approx. 1,800 seeds per plant.

Seed
Elliptical with a ”feed shovel”-shaped commissural surface and an approx. 5-8 mm long awn. The bract is 7-9-veined, convex with open lateral edges on the upper third. The rachilla is approx. 1 mm long, slightly curved with a bowl-shaped head. The ventral furrow is broad and flat-bottomed with a narrow longitudinal groove. The surface is short-haired on the rachilla and bract. Thousand grain weight approx. 3.6 g.

Biology

Propagation and dispersal
Only through seeds.

Habit
Winter and summer annual, or biennial.

Importance

The species is common throughout Denmark. It is mostly found along field edges in both autumn- and spring-sown crops. In a number of grass seed crops the plant is undesirable because it is difficult to separate the seeds.

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Taxonomy

Gramineae.

Names in different languages

Danish : Hejre, blød
German : Weiche Trespe
English : Soft Brome
Latin : Bromus hordeaceus L.
Norwegian : Lodnefaks
Swedish : Luddlosta
Soft Brome: Very early stage
Very early stage
Soft Brome: Early stage
Early stage
Soft Brome: Leaf sheath
Leaf sheath
Soft Brome: Spikelets
Spikelets
Soft Brome: Mature plant
Mature plant
Soft Brome: Seeds
Seeds
 
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