Reproducing only by seed.
Stem are normally round, but occasionally distinctly flattened.
Yellow foxtail is characterized by having a few, prominent, silky, kinky hairs (a) 3 - 10 mm long on the upper surface of the leaf blade just near the stem; ligule (b) a fringe of hair; no auricles; leaf sheaths split, their margins (c) smooth, green or slightly membranous and transparent.
Inflorescence a spike (C) 2 - 10 cm long, covered with numerous, yellow to orange bristles (d) with forward-pointing barbs. Spikelets (â€œseedsâ€ or â€œgrainsâ€) slightly larger than Green foxtail, more prominently cross-ridged, and yellowish or straw-coloured. Flowers from July to August.
Fibrous root system.
Yellow foxtail occurs throughout the agricultural regions of Ontario, having essentially the same distribution as Green foxtail but often being less abundant.
Corn yield loss (%)*: 1 % at 1 plant/m2 5 % at 5 plant/m2 Soybean yield loss (%)*: 1 % at 1 plant/m2 5 % at 5 plant/m2 *assumes that the weed has emerged with the crop and has been left uncontrolled all season.
It is distinguished from the other foxtails and, indeed, from all other grasses in Ontario by the prominent silky, kinky hairs on the upper surfaces of the leaf blades just near the stem.
Yellow foxtail is not known to be toxic.
Yellow foxtail is not a known allergen.
No information exists at this time.
No information available at this time.
Barnyard grass (ECHCG), Large crabgrass (DIGSA), Proso millet (PANMI), Witch grass (PANCA)
Currently none available for this weed. 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.
Triazine resistant (WSSA group 5) populations exist in York Region (ON). For more information on weed resistance: http://www.plant.uoguelph.ca/resistant-weeds/
Yellow foxtail: A. Plant. B. Leaf-base. C. Spike.
Leaf blade: Base of leaf blade covered with a number of straggly hairs that are roughly 1-2 cm in length.
Leaf sheath: Hairless margins and very flat when compared to the round sheaths of green and giant foxtail.