Noxious Weeds
Scentless Chamomile - white daisy like flowers that spread quickly along roadsides and other areas with little competition. Scentless Chamomile also reduces yields in hay fields, pasture, and cropland.
- also known as mayweed
- one plant can produce up to one million seeds
- seed is viable as soon as a flower forms
- seed is spread readily be wind and water
- as much as 26% of seed fed to cattle remains viable in manure
- seed can remain viable for up to 15 years
Common Tansy - fern like leaves, with yellow button like flowers in clustered heads. Tansy spreads by seed and rhizomes (underground stems). If left unchecked tansy can infest hay and rangeland.
- forms dense patches
- cannot withstand cultivation
- very persistent weed
- can grow to 1.5 metres tall
Because tansy is a very persistent weed it is very hard to eradicate. Cultivation and spraying with recommended herbicides are among the options for controlling this evasive weed.
Toadflax - yellow snapdragon like flowers, leaves narrow and attached directly to the stem. Toadflax is a perennial that spreads by seed and rhizomes (underground stems).
- prolific seed producer
- very aggressive weed in rangeland - it quickly replaces grasses and forbs
- problem weed in zero and minimum till fields
Because Toadflax is so aggressive it can become a problem in a very short time. Cultivation and application of recommended herbicides are just a couple of control measures that can be taken to control Toadflax.
Leafy Spurge - is a deep rooted perennial that spreads by seeds and rhizomes (underground stems). Although Leafy Spurge is not a problem in the County of Vermilion River it is a widespread problem in southern Alberta. Once it is established it is very difficult to eradicate.
