Emerald Ash Borer in Colorado - Identification of Insects and Damage of Similar Appearance

John Reffel III - Wednesday, April 19, 2017
The emerald ash borer (Agrilus plannipennis) is a wood boring beetle of Asian origin that has become established in parts of the upper Midwest. It is extremely damaging to all North America species of ash (Fraxinus), including green ash and white ash that are very commonly grown in Colorado landscape settings. Click here for additional info from Colorado State University. (/Docs/Emerald_borer_CSU.pdf)  
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Ips beetles

John Reffel III - Wednesday, April 19, 2017
Ips beetles, sometimes known as “engraver beetles,” are bark beetles that damage pine and spruce trees. They develop under the bark and produce girdling tunnels that can cause die-back and kill trees. Eleven species of ips beetles occur in Colorado. Click here for additional info about IPS Beetle in Colorado (/Docs/ipsbeetle.pdf)  
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Lilac/Ash Borer: A Common Wood Borer of Colorado’s Street Trees

John Reffel III - Wednesday, April 19, 2017
Lilac / Ash Borer needs to treated during the spring. Please contact JLS (/contact.html) to schedule or click the link below for additioanl info. https://extension.colostate.edu/docs/pubs/insect/05614.pdf  
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