Agriculture

Scentless Chamomile

Scentless chamomile seedling
 		 Scentless chamomile juvenile plant 
click to enlarge		 Scentless chamomile stem and leaf attachment Scentless chamomile leaf
Scentless chamomile annual plant and root Scentless chamomile roots on a perennial plant Scentless chamomile flower Scentless chamomile flowers
Scentless chamomile roadside population Scentless chamomile seed head Scentless chamomile seeds  

Biology

This weed is an annual, biennial to short-lived perennial, reproducing by seeds. The stems are erect, up to 1m tall, smooth, and multi-branched. The leaves are alternate, finely divided into thread-like segments, mostly sessile, dark green, and scentless when crushed. The flowers are daisy-like. The heads are radiate; white ray florets around the margin and yellow tubular florets in the center. The seeds are small, 2 mm long, slightly grooved, dark brown, and may have a small pappus.

Scentless chamomile can produce up to 300,000 seeds per plant and thrives in solonetzic soils. The seed survives for long periods in undisturbed soil.

Scouting Techniques

Scout roadsides, waste areas, and the edges of sloughs and water courses for patches of this weed because the seed is light weight and floats readily on water. Take a minimum of 20 weed counts across the field.

Effects On Crop Quality

Directly affects the development of field crops by competition.

Control Tips

  • Group 4 herbicides
  • Group 2 ( Refine Extra)
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