|Scientific Name||Polygonum convolvulus L.|
|Synonyms||Bilderdykia convolvulus (L.) Dumort, Fallopia convolvulus (L.) A. Löve|
|Common Names||English: Black bindweed, wild buckwheat; German: Windenknöterich; French: Renouée liseron; Spanish: Polígono trepador, albohol|
|Description||Annual, winding weed with branching, deep-sinking roots. Before flowering, it is easily confused with field bindweed (Convolvulus arvensis). The plant grows 20 - 150 cm (7.87 - 59.05 inch) tall.|
Triangular/arrow-shaped leaves with downward-pointing, teardrop-shaped tip; creeping growing habit.
Long, narrow, the two halves unequal in size. Cotyledons bend downwards (field bindweed has heart-shaped, long-stemmed cotyledons).
Thin, single or ramified, twisting, 20-100 cm (7.87 - 39.37 inch) long or high.
Cordate-sagittate, petiolate, juicy green, often reddish-tinged, pinnate-nerved, with ligule often incised.
Leaf tips retracted downwards.
Small, inconspicuous, short-pedunculate, greenish, white-margined, in pairs or several in the axils.
Germination in spring. The germination depth is from 0.5-4 cm (0.19 - 1.57 inch). The seeds are encased in the brown remnants of the perianth and hard with an impermeable seed coat and very high starch content.
Wild buckwheat is a late germinator.
Viability of Seeds
Up to 20 years or more.
Approx. 100-1,000 seeds per plant.
Waste ground, disturbed sites, open woods, roadsides, railroads, fence rows.
Particularly on nutrient-rich, moderately acidic, light to medium-heavy soils, including boggy soils.
Additional Crop Information
One of the most common weeds in cereals and root crops. Due to its winding growth habit, it seriously reduces yields and interferes with combine harvesting. It sometimes forms a very dense weed layer that strongly competes with the crop. Wild buckwheat may cause skin irritation after dermal contact and photosensitivity in cattle after heavy ingestion.
Useful non-chemical contribution to Integrated Weed Management
Combinations of preventive, physical and chemical control methods.
Various herbicides using different modes of action including some auxin mimics and several ALS-inhibitors offer acceptable to good efficacy. It is important to rotate modes of actions in order to avoid resistant weed populations.
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