|Scientific Name||Bromus secalinus|
|Common Names||English: Rye brome; German: Roggen-Trespe; French: Brome faux seigle|
|Description||B. secalinus is a tufted annual grass propagated by short living seeds, mostly germinating in winter wheat and winter barley, 10-30 cm (3.93 - 11.81 inch) tall, hardy annual, sometimes annual.|
The awns are not very long, or even be missing totally. Caryopsis is plump and heavy.
At the youth stage the blades are covered with moderately stiff hairs above and harsh, the youngest leaf is rolled.
Erect, softly haired at the nodes and 30-100 cm (11.81 - 39.37 inch) high.
The ligule is 1-4 mm (0.039 - 0.157 inch) long, toothed, yellow to brownish.
Upper sheaths are smooth and strongly nerved. Sheaths are tubular, hairless and usually closed.
The panicle (3 to 20 cm, 1.18 - 7.87 inch) long bears ascending branches, the lower ones becoming divergent when maturing. Spikelets are borne on elongate pedicels, 5 to 15 flowered, glabrous or scabrous, in maturity lax. The lemmas are spreading-ascending at maturity, strongly inrolling (thereby "opening" the spikelet), furthermore firm, subequal, obscurely 7-nerved, mostly 5 - 8 mm (0.19 - 0.31 inch) long. Awns straight or flexuous, 1 - 6 mm (0.039 - 0.23 inch) long, deciduous, sometimes slightly projecting in maturity.
End of spring until summer.
Germination occurs mostly in autumn, sometimes in spring.
Viability Of Seeds
Very short living seeds (1-2 years).
By seeds, 800 -1,600 seeds per plant.
Grainfields, meadows, wasteland, field borders, and roadsides.
B. secalinus prefers nitrogen rich, sandy to loamy and slightly acidic soils.
Additional Crop Information
Cereals, mostly wheat and barley.
In Europe and parts of North America abundance and size of infested area is still increasing due to low efficacy of ALS-inhibitors in barley. Reduced soil tillage and increasing proportion of winter cereals in the rotation, causes high yield loss in high density patches and sometimes results in difficulties at harvest.
Integrated Crop Management
Careful seed cleaning and selection of weed free fields for seed propagation, planting competitive wheat and barley varieties, late sowing of winter wheat, mouldboard ploughing, rotating winter annual and summer annual crops, mowing field borders, burning stubbles may reduce the weed infestation.
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