Planteværn Online > Skadevoldere - Weed biology<br> <sub>Agro-region: Denmark</sub> - Perennial Rye-grass, metabolic
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5.5 2024 undefined

Weed biology
Agro-region: Denmark

Perennial Rye-grass, metabolic Previous page Next page

Go to identification key for weeds

Can be mistaken for

Perennial Rye-grassthat is morphologically identical but not resistant to fop/dim- and ALS-herbicides

Resistance to herbicides

There have been significant populations of this weed in Denmark, which requires special considerations in the control. Read more here.

Characteristics

"Early stagesFolded vernation. The leaves seem soft and limp. The underside of the leaves are highly shiny. Small-toothed leaves. The ligule is short, approx. 1 mm. The lower leaf sheaths are often reddish purple.
Mature plantPerennial Rye-grass is a medium-sized grass species with 20-50 cm high, erect, highly shiny stems. The awnless spikelets are joined in an open, oblong spike. The edge of the spikelets faces the straw unlike Couch-grass, where the surface of the spikelet faces the straw.
Seed production: Up to approx. 150 seeds per spike.

Biology

Propagation and dispersalMainly through seeds.
HabitPerennial.

Importance

The species is frequently found at properties where it is part of the crop rotation as either roughage or seed crop. As a weed Rerennial Ryegrass can be found in all types of crops, where it can cause some losses at large densities. Perennial Rye-grass is undesirable in seed fields with Cocksfoot, Meadow Fescue and Red Fescue because it is difficult to separate the seeds.

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

Taxonomy

Gramineae.

Names in different languages

Danish : Rajgræs, alm., metabolisk res
German : Deutsches Weidelgras, metabolisch
English : Perennial Rye-grass, metabolic
Latin : Lolium perenne L., metabolic
Norwegian : Raigras, metabolisk
Swedish : Engelskt Rajgräs, metabolisk
Perennial Rye-grass, metabolic: Very early stage
Very early stage
Perennial Rye-grass, metabolic: Early stage
Early stage
Perennial Rye-grass, metabolic: Ligule
Ligule
Perennial Rye-grass, metabolic: Shiney leaf underside
Shiney leaf underside
Perennial Rye-grass, metabolic: Flowering spikelets
Flowering spikelets
Perennial Rye-grass, metabolic: Mature plant
Mature plant
Perennial Rye-grass, metabolic: Seeds
Seeds
 
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