Reproducing only by seed.
Stems 5 cm to more than 2 m long, slender, prostrate or twining vine-like over other plants or any available support, with a short ocrea (membranous sheath) (a) at each node (joint).
Leaves alternate (1 per node), arrowhead-shaped with pointed basal lobes (b) and elongated slender tips (c).
Flowers (d) small, 5 mm across, with 5 greenish to whitish sepals (no petals), in small clusters at tips of short branches or from axils of leaves (C); â€œseedsâ€ dull black, 3 mm long, pointed at both ends but sharply triangular in cross-section and often partly or wholly enclosed by the dry sepals even after shattering from the plant. Flowers from July to August.
Fibrous root system.
Wild buckwheat is a common weed in cultivated fields and gardens throughout all of Ontario and its â€œseedsâ€ frequently contaminate small grains.
Corn yield loss (%)*: 2 % at 1 plant/m2 10 % at 5 plant/m2 Soybean yield loss (%)*: 4 % at 1 plant/m2 15 % at 5 plant/m2 *assumes that the weed has emerged with the crop and has been left uncontrolled all season.
It is distinguished from all other weedy members of the Smartweed Family by its twining stems, its arrowhead-shaped leaves, and its seedling usually having longer cotyledons (e) (7 - 33 mm) long. It is distinguished from Field bindweed by its annual root system with thin, downward-tapering taproot (f), the presence of an ocrea (a) around the stem at each node (joint), its very small, short-stalked greenish flowers (d), borne in the axils of leaves (C) or in clusters along short branches, and its dark, sharply triangular seeds.
Wild buckwheat is not known to be toxic.
Wild buckwheat is not a known allergen.
No information exists at this time.
No information available at this time.
Field bindweed (SONAR)
Currently none available for this weed. For the latest research on biological weed control: http://res2.agr.ca/Lethbridge/weedbio/index_e.htm#toc
Currently none available for this weed in corn and soybean.
There are no known cases of herbicide resistance to this weed in Canada. For more information on weed resistance: http://www.plant.uoguelph.ca/resistant-weeds/
Wild buckwheat: A. Base of plant. B. Portion of stem twing around another stalk. C. Section of stem with leafstalk, ocrea and 2 flowers.
Cotyledons of wild buckwheat.
Wild buckwheat at the 1-leaf stage.
Leaves and flowers of wild buckwheat.
Mature wild buckwheat.