Weed of the week: scentless chamomile

presented by the Sea to Sky Invasive Species Council

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Scentless Chamomile is another daisy look-alike that is unwelcome in our region! The daisy-like flowers are 2-3cm in diameter, and odourless when crushed; the foliage is very lacy in appearance (fern-like). This invasive prefers wet soils, so it if often found in drainage ditches, shorelines, and roadsides.

Scentless Chamomile is considered invasive because it forms dense stands in pastures and hay fields. It also reduces yields and is unpalatable to livestock. Scentless Chamomile negatively impacts aquatic systems where monocultures form near water bodies or riparian areas, on sites with heavy soil and high soil moisture, or in areas that are subjected to periodic flooding.

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How to remove it:Mowing can be used to reduce seed production in pastures, hayfields, and non-crop areas, and should be done early and often before flowers are formed. Frequent, shallow tillage can be used to control seedlings if done during hot, dry weather and before plants flower. Hand-pulling small infestations before they go to seed can prevent new infestations from developing.

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