Can be mistaken for
CharacteristicsCotyledons
Almost oval with entire leaf margins. Stalked. The surface is often sparsely hairy. Length approx. 7-10 mm.
True leaves
Oval to lancet-shaped with entire leaf margins. Unstalked. Almost smooth surface. Length approx. 18-40 mm.
Mature plant
Redshank is a medium-sized (30-50 cm), erect plant. It is especially known by the black spots in the middle of the true leaves and by the spikelike inflorescences. The diameter of the flower is approx. 2 mm. Seed production: Up to approx. 800 seeds per plant.
Seed
Two types. The main type like Pale Persicaria, but plumper. The other type is somewhat triangular with rounded edges. The surface of both types is almost smooth, often showing remnants of the perianth. Thousand grain weight approx. 2.7 g.BiologyPropagation and dispersal
Only through seeds.
Habit
Summer annual.ImportanceThe species is found most frequently in spring-sown crops throughout Denmark, but can also be found in autumn-sown crops. It thrives in waterlogged soil and can cause large yield losses, even in competitive crops such as cereals and Oil-seed Rape.
For treatment options, consult 'Herbicides Across'. For more options, consult 'Main Menu'.TaxonomyPolygonaceae.Names in different languagesDanish : | Pileurt, fersken | German : | Floh-Knöterich | English : | Redshank | Latin : | Polygonum persicaria L. | Norwegian : | Hønsegras | Swedish : | Åkerpilört |
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Seedling | Early stage |
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