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Importance

An increasing problem in arable situations. Many of the rye-grasses encountered in arable weed situations may be commercial hybrids with associated high vigour. Herbicide resistance is growing.

Description

Large, stout, fast growing and densely tufted annual or biennial 30 - 90 cm. Flower head is flattened with the spikelets arranged alternatively on opposite sides of the stem. Spikelets are awned, unlike perennial rye-grass.

Ligule

Italian rye-grass liguleShort: 1-2 mm. Blunt.

 

 

 

 

 

 

 

 

 

Auricles: Small if present.

Leaf blade: Dark green, hairless. Leaf blade rolled in bud.

Italian rye-grass 1
Italian rye-grass 2
Italian Rye-grass - youngRye-grass young plant.
Italian rye-grass ligule photoItalian rye-grass ligule. Photo © HGCA.

 

 

Italian Rye-grass - matureItalian rye-grass close-up of spikelets. Note the presence of awns.

Identify grass-weeds

You can use this page to help identify the grass-weeds in your crops, and then find out about the best crop protection products to control them.

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