Why controlling noxious weeds is important
What Are They ? - Why We Should Care
Non-native and Unchallenged
What distinguishes noxious weeds from other plants is that they
are not native to the United States. They grow unchecked by natural
predators and enemies such as insects or diseases. In their native
environment these forces prevent the weeds from taking over.
Aggressive Environmental Disrupters
A common characteristic of all noxious weeds is their aggressive,
competitive behavior. Typically, they steal precious moisture, nutrients,
and sunlight from surrounding plants. Some wetland weeds even rob
waterfowl and mammals of their food sources, nesting areas, and
access to water which they need for protection from predators. Noxious
weeds establish themselves in soil disturbed by construction, travel,
recreation, etc. Then wildlife, livestock, machinery, recreational
vehicles, people, wind, and water transport seeds from existing
noxious weed infestations to new sites. Of the 1,300 native species
of plants in Colorado, 130 or 10% have been displaced by non-native
weeds.
Taking Away Our Natural Resources
Once established, noxious weeds have a tremendous capacity to invade
adjacent, undisturbed natural plant communities. This is particularly
true in the drier moisture regimes at lower elevations. These areas
most closely resemble the conditions in Eurasia where virtually
all of the alien noxious weeds evolved. The biology of noxious weeds
allows them to progress from a small, manageable problem to a huge,
economically and environmentally impossible one when given the opportunity.
Noxious Weeds Impact Our Enjoyment of The Land
Colorado, like the rest of the West, is blessed with a great diversity
of both plant species and plant communities. The variety and vegetative
landscapes in our state are key reasons why we choose to live and
recreate here. However, increased demand upon these wild lands necessitates
that we all become sensitive to their environmental needs and protection
if they are to survive. They are wild lands because they have not
been significantly transformed in shape, quality, or appearance
and are covered with native plants.
Native Plants Are Threatened
A conspicuous threat to our native plant communities is the invasion
of alien, noxious weeds such as leafy spurge, yellow toadflax, downy
brome, and Canada thistle, among others. We are giving these weeds
the opportunity to establish in new areas and spread from initial
infestations. Much of this is due to the lack of an educated public
- particularly people who frequently use our lands and resources.
Do You Understand Why Weeds Destroy Native Habitats?
In the past we have done an inadequate job of educating people
about the negative environmental impact of noxious weeds. Prevention
and early detection allows us to eradicate new outbreaks and devote
our principle efforts toward management and containment of existing,
large-scale infestations.
Integrated Management Is The Solution
Weed scientists and biological scientists state that biological
control options for noxious weeds are expanding at a rapid rate.
However, they caution that biocontrol is not and never will be a
cure all or total replacement for judicious herbicide use. Instead,
scientists stress that successful long-term management of noxious
weeds relies on a combination of biological, chemical, cultural,
and physical methods - an integrated approach. Integrated weed management
and improved land management are the answer.
We Can All Help Maintain Our Ecosystem
As land users and managers, we need to maintain plant diversity
and natural productivity of our natural resources. To accomplish
this we must increase awareness and education about the adverse
effects of noxious weeds. If we are diligent in our efforts, we
will successfully maintain natural resources with plant diversity
and a balanced ecosystem for the enjoyment and perpetuation of future
generation.
- the above text courtesy of the Colorado Weed Management Association
Early detection is the key to controlling noxious weeds. Established
populations may be impossible to eradicate. Identifying new populations
and protecting lands not presently infested is the most cost-effective
way to manage weeds. Because of Gilpin County's unique environment,
noxious weed have only recently established a foothold here.
If you see a new weed infestation, call
the Extension Office! 303-582-9106
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