Restricted Weeds--Weeds in this
category pose a serious threat, and as such must be eradicated.
Generally these weeds possess characteristics of rapid spread, and superior competition.
These weeds are usually found in small numbers in Alberta, and are designated
restricted to prevent their establishment. Individual municipalities
have the power to, and from time to time do elevate certain species to
restricted status. Weed notices must be issued for plants in this
category.
Noxious Weeds--Weeds designated
noxious have the ability to spread rapidly, and cause severe crop losses and economic
hardship. These weeds should be controlled to prevent further establishment, and
spread. Weed notices may be issued for plants in this category at
the discretion of the weed inspector.
Nuisance Weeds--These
weeds are common to the Province, and in many cases are native species. They can be
found on nearly all land throughout the Province, and as such are very difficult to
eradicate. They can cause significant economic losses, but are so biologically
suited that they cannot effectively be eradicated. Weed notices will not be issued
for plants in this category.
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