Description of Plant: hoary
cress is perennial,
and it grows up to 50 cm high. It has a bluish green
appearance.
It's rosette leaves are toothed, and its upper leaves are
smaller. Roots are wide
spreading and penetrate deeply; thick and grow vertically
and horizontally, producing side shoots from the rootstocks. It's
flowers are small, white, and are in umbrella like clusters.
It's fruit is heart shaped, and the roots are creeping. It
currently infests 56,000 acres in Montana. It is also declared a
noxious weed in Washington, Oregon, and Idaho. It is a perennial
weed.
That means that it lives for more than one year. It infests
pasture
areas, roadsides, and waste areas and is on the increase in the
Whitehall, Montana area. (1)
Useful Herbicides:
Round-up, and 2,4-D
| Herbicide Brand |
How to Apply |
When to Apply |
Comments |
| Round-up |
broadcast |
flower stage |
|
| 2,4-D |
broadcast |
3 times a year for 3 consecutive years |
|
| Escort |
broadcast |
prior to or at early flowering |
.5 to 1 oz per acre |
| Banvel + 2,4-D |
broadcast |
prior to or at early flowering |
1 qt Banvel + 1qt 2,4-D per acre |
Further Information about these herbicides:
Herbicide Brand Active Ingredient Mode of
Action Comments Round-upglyphosatesystematic
2,4-D2,4-D amine or 2,4-DLV estersystematic
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You Can Find More
Information On Chemical Controls for Whitetop On
These Selected Sites:
Updated
By JD 2/06