Invasive Species
Forest Pests in Colorado
Forest pests such as beetles, fungi, and pathogens threaten millions of trees in the United States. Most of these pests originally arrived from foreign countries on commercial vessels carrying wooden pallets and crates containing the invasive pests. Humans have further spread them by moving firewood around the country. This can start new infestations hundreds of miles from the site of origin and destroy entire populations of trees.
Threats to Colorado
Emerald Ash Borer
The emerald ash borer is an exotic beetle that originates from Asia and devastates ash trees. It was first discovered in southeastern Michigan in the summer of 2002, and has since spread to many other states, including Colorado. The emerald ash borer was discovered in Boulder, Colorado in September 2013.
Spongy Moth
The spongy moth was accidentally introduced to Massachusetts in 1869. By 1902 it was widespread in the New England states, eastern New York, and regions of New Jersey. The egg masses are deposited by females in July and overwinter on trees, stones, and other substrates.
Japanese Beetle
The Japanese beetle is a pest to hundreds of plant species and is known to be one of the worst pests known to eastern and Midwestern United States. It generally attacks in aggregate, devastating ornamental plants.
Help Protect Colorado from Forest Pests
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Firewood
It is recommended that people use firewood from Colorado whenever possible. Find local firewood dealers on the Colorado State Forest Service COWood website. When camping, people should try to buy firewood near their destination campground, to help prevent transporting pests elsewhere. Firewood should be burned in the same area where it was purchased and should not be transported to other areas in Colorado.
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Plant Native Species
Exotic garden plants and pets can escape and invade native ecosystems! Landscape with plants native to your area. Native plants require less water, fertilizers, and pesticides and often provide advantages for wildlife such as food, cover or nesting sites for butterflies or birds.
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Avoid Seed Mixes
Stay away from seed mixtures, especially ones labeled “wildflowers.”
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Buying Plants or Seeds Online
Use caution when buying plants or seeds on the internet or by mail order as you may unknowingly contribute to the spread of invasive species from one part of the country to another. Plants native to one region can be invasive in another region.
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Never Release
Do not dispose of aquarium water, pond plants or animals into local water bodies. Some exotic plants and animals sold for water gardens and aquaria are highly invasive.
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Dispose seeds and plants correctly
Discard unwanted seeds, plants or garden clippings in the garbage, not in natural areas or parks. Respond aggressively and act quickly to rid your land of noxious weeds and other invasive species.
Help Protect Colorado's Forests
Protect Colorado's forests by reporting a sighting of a forest pest.