Phalaris paradoxa

Scientific Name Phalaris paradoxa
Common Names English: Hooded canarygrass; German: Seltsames Glanzgras; French: Alpiste paradoxal; Spanish: Alpiste
Description Annual grass.

Descriptions

Characteristic Features

Glumes with marked teeth, panicle 4-5 cm (1.57 - 1.97 inch) long, 1-1.5 cm (0.39 - 0.59 inch) wide.

Young Plant

Plant tufted, leaves with a flat blade, youngest leaf rolled, abundant tillering with numerous forks arising from nodes.

Stems

30-120 cm (11.81 - 47.24 inch) high, stem spreading then ascending.

Leaves

Membranous and truncate ligule.
With auricles.
Leaf-sheath open.
Upper leaves have a swollen leaf-sheath which envelopes the inflorescence before flowering.

Propagation Organs

Flowers

Inflorescence spike -like, narrowed at both ends; usually and partly enclosed in the leaf sheath.
Seeds 6-7 in flattened spikelet.

Flowering Period

Early summer.

Fruit

Caryopsis, 2.5 mm (0.098 inch) long.

Seeds

Germination in autumn and winter.

Viability of Seeds

Short lived in soil seed bank.

Propagation

By seeds.
Persistent seed bank, emergence from shallow depths (< 3 cm, 1.18 inch).

Occurrence

Habitat

P. paradoxa is an aggressive annual grass weed of many crops in moderate and warm areas (Mediterranean basin, Asia, Australia, Mexico, Southern States of the USA, Southern Europe, East Europe).

Soil

Hooded canarygrass prefers alluvial, sandy-clay or clay texture soils with high soil moisture.

Additional Crop Information

Cereals (spring and winter).

Agricultural Importance

P. paradoxa is frequency increasing in crops.

Control

Useful non-chemical contribution to Integrated Weed Management

Crop competition and high seeding density of crop may reduce P. paradoxa development.

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