|Scientific Name||Polygonum aviculare L.|
|Common Names||English: Prostrate knotweed; German: Vogelknöterich; French: Renouée des oiseaux; Spanish: Centinodia|
|Description||Annual, seed-propagated weed with spindle-shaped root. Depending on location P. aviculare is extremely various in habit and leaf form.|
Prostrate growth, mostly branching from base, small leaves.
Very long, evenly slender, bluntly pointed.
Usually prostrate, heavily ramified, leaves at the nodes up to the tip, up to 50 cm (19.5 inch) long.
Elliptical or lanceolate to linear, pinnate-nerved, hardly petiolate, emerging from a thin, membranous, stalk-enclosing, incised tube (stipule sheath).
Small, short-pedunculate, pink or greenish-white, in groups of 2-5 in the axils.
Summer - autumn.
Nutlet with 3 more or less equal flat or concave faces, 2-3 mm (0.078 - 0.118 inch) long, dark brown to black, minutely roughened.
Germination from spring - late summer. The seeds are triangular, mostly with parts of the perianth and dark brown. P. aviculare is a shallow germinator and dependent on sufficient light for normal development.
Viability of Seeds
By seed. 125-200 seeds/plant.
Sandy, gravelly, or rocky coastal areas, grassland, disturbed soils of waste areas, roadsides and gardens.
Undemanding, Prostrate knotweed will tolerate almost all soils.
Additional Crop Information
P. aviculare is a competitive weed since it often occurs in high densities and indicates soil compaction. It is less sensitive to herbicides typically applied in corn. Seed production rate is high. Prostrate knotweed also is a very troublesome weed in turf.
Useful non-chemical contribution to Integrated Weed Management
Polygonum aviculare requires light for growth, consequently dense, early seeded and rapidly growing crops suppress this weed effectively.
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