What is a
Noxious Weed?
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Any plant designated by Federal, State or County government as injurious to public health, agriculture, recreation, wildlife or property.
Outbreak Map
Find Noxious weed outbreaks in your area
Noxious weeds pose unique dangers
Explore the categories below to learn more about the types of weed that could affect you most.
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cheatgrass-dryfloret
Dead cheatgrass turns fully brown or tan; the florets are now very dry and spikey. At this point, it can injure livestock and horses if consumed.
cheatgrass-florets2
Young cheatgrass florets; at this point they may be safe and palatable for livestock.
cheatgrass-mature
At the end of its life cycle, cheatgrass plant has turned brownish-red and is no longer good forage.
cheatgrass-stem
Cheatgrass stems begin to turn red as the plant matures, note the thin white collar-like ligule at the base of the leaf blade.
cheatgrass-stems
A community of cheatgrass stems; it is not uncommon for some of the foliage to turn yellow prematurely, especially during dry times.
siberianelm-mature
Mature Siberian elms grow up to 70ft tall and are commonly planted as shade trees in urban settings.
siberianelm-bark
The bark of Siberian elm is dark grey, deeply grooved with a rough texture, especially as it ages. Younger trees may have a more uniform texture composed of interlocking narrow plates.
siberianelm-seeds
Siberian elm seeds are flat, small, and round- or oval-shaped; the main seed is surrounded by a thin papery wing, slightly translucent and light green to yellow or tan; distinctive brown tip
siberianelm-hazard
This Siberian elm growing into power infrastructure creates an electrical hazard if the branches were to collapse or catch fire
siberianelm-windbreak
Siberian elms were promoted by the federal government as windbreak to prevent soil erosion
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siberianelm-mature
Mature Siberian elms grow up to 70ft tall and are commonly planted as shade trees in urban settings.
siberianelm-bark
The bark of Siberian elm is dark grey, deeply grooved with a rough texture, especially as it ages. Younger trees may have a more uniform texture composed of interlocking narrow plates.
siberianelm-seeds
Siberian elm seeds are flat, small, and round- or oval-shaped; the main seed is surrounded by a thin papery wing, slightly translucent and light green to yellow or tan; distinctive brown tip
siberianelm-hazard
This Siberian elm growing into power infrastructure creates an electrical hazard if the branches were to collapse or catch fire
siberianelm-windbreak
Siberian elms were promoted by the federal government as windbreak to prevent soil erosion
