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Insects

Emerald ash borer (EAB), Agrilus planipennis Fairmaire, is an exotic beetle that was discovered in southeastern Michigan near Detroit in the summer of 2002. The adult beetles nibble on ash foliage but cause little damage. The larvae (the immature stage) feed on the inner bark of ash trees, disrupting the tree's ability to transport water and nutrients. Emerald ash borer probably arrived in the United States on solid wood packing material carried in cargo ships or airplanes originating in its native Asia. Emerald ash borer is also established in Windsor, Ontario, was found in Ohio in 2003, northern Indiana in 2004, northern Illinois and Maryland in 2006, western Pennsylvania and West Virginia in 2007, Wisconsin, Missouri and Virginia in summer 2008, Minnesota, New York, Kentucky in the spring of 2009, Iowa in spring of 2010, and Tennessee in the summer of 2010 . Since its discovery, EAB has:

  • Killed tens of millions of ash trees in southeastern Michigan alone, with tens of millions more lost in Illinois, Indiana, Kentucky, Minnesota, Missouri, New York, Ohio, Ontario, Pennsylvania, Tennessee, Quebec, Virginia, West Virginia, and Wisconsin.
  • Caused regulatory agencies and the USDA to enforce quarantines (Michigan, Illinois, Indiana, Iowa, Maryland, Minnesota, Missouri, Ohio, New York, Ontario, Pennsylvania, Tennessee, Virginia, West Virginia, Wisconsin, and Kentucky) and fines to prevent potentially infested ash trees, logs or hardwood firewood from moving out of areas where EAB occurs.
  • Cost municipalities, property owners, nursery operators and forest products industries tens of millions of dollars.

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Emerald Ash Borer: "Agrilus planipennis Fairmaire"

Currently the city of Cedar Rapids Forestry Program is monitoring the status of 2 introduced pests into the United States. The Gypsy Moth and the Asian Longhorn Beetle. They have not been found in Cedar Rapids at this time, but they have been found close by.
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Gypsy Moth:" Lymantria dispar"
The Gypsy Moth is an imported pest that has devastated parts of the Eastern United States. There have been some sightings in Iowa, and the areas have been aggressively treated. A good web site for more information is Iowa State University.

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Asian Long Horned Beetle
The Asian Long horned Beetle, which is from China has been found as close as Chicago, Ill. Believed to have hitchhiked in wooden packing crates from China. It is very expensive to eradicate as the only way is to remove all infected trees and the healthy trees immediately surrounding the affected area. A very good web site on this subject is the National Forest Service.

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Japanese Beetle: "Popillia japonica Newman"
The Japanese beetle (Popillia japonica Newman) is a highly destructive plant pest of foreign origin. It was first found in the United States in a nursery in southern New Jersey nearly 80 years ago. In its native Japan, where the beetle's natural enemies keep its populations in check, this insect is not a serious plant pest.

In the United States, however, the beetle entered without its natural enemies and found a favorable climate and an abundant food supply. By 1972, beetle infestations had been reported in 22 States east of the Mississippi River and also in Iowa and Missouri. Since then, the pest has continued to disperse south and west. Isolated infestations have been found in Wisconsin, Oregon, and California. Without its natural checks and balances, the Japanese beetle has become a serious plant pest and a threat to American agriculture.

Click here for additional information on the Japanese beetle.

Diseases
There are several diseases that affect the urban canopy in Cedar Rapids. Most are primarily aesthetic issues that don't affect tree health. The two primary diseases of concern are Oak Wilt and Dutch Elm diseases. Bur Oak Blight is also a growing concern. The current plan for managing these issues is the following:

How to Identify and Manage Dutch Elm Disease
http://na.fs.fed.us/spfo/pubs/howtos/ht_ded/ht_ded.htmmoval

Oak Wilt - Identification and Management
https://store.extension.iastate.edu/Product/sul15-pdf

Bur Oak Blight Pest Alert
http://na.fs.fed.us/pubs/palerts/bur_oak_blight/bob_print.pdf

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