CAPS Update: Japanese Beetle

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CAPS Update: Japanese Beetle

 
  The area of Orem, Utah that has been treated for Japanese beetle over the last 4 years. (Map adapted from Protecting Utah’s Agriculture: 2010 Insect Report, Utah Department of Agriculture and Food.)

The Japanese beetle, Popillia japonica, is an introduced pest that has caused a lot of destruction in the eastern U.S. The larvae can damage lawns and nursery stock, while the adults feed on foliage and fruits of over 300 plant species. Japanese beetles can be difficult to control and are a threat to Utah’s agriculture and nursery industries.

In 2006, a Japanese beetle infestation was discovered in Orem, Utah. Pheromone traps were used to determine the extent of the infested area. The Utah Department of Agriculture and Food partnered with private and government entities on both the local and national levels to develop and carry out an eradication program, which has been highly successful. Monitoring of the Orem area will continue in 2012. The continuation of insecticide treatments in the area will depend on the results of this year’s trapping efforts; thus far, no beetles have been caught.

In addition to the Orem infestation, a single Japanese beetle was detected in both Cache and Salt Lake Counties in 2009 and a single beetle was detected in Salt Lake County in 2010. In each of these instances, a delimiting grid of traps showed no further beetle detections.

 

Timeline Number of Traps Number of Beetles detected
1993-2006 481  1 (Salt Lake Intl. Airport)
2006 581 671
2007 3000  2157
June- Aug 2007: treated 480 acres of turf & 500 acres of foliage in Orem
2008 3471 100
June-Aug 2008: treated 326 acres of turf & 808 acres of foliage in Orem
2009  3280 7 (includes 1 in Cache County & 1 in Salt Lake County)
June-Aug 2009: treated 154 acres of turf & 92 acres of foliage in Orem
2010 3241 2 (includes 1 in Salt Lake County)
June-Aug 2010: treated 46 acres of turf & 0 acres of foliage in Orem
2011 2898 0 (year to date)
April-present: treated 40 acres of turf & 0 acres of foliage in Orem

Japanese beetle traps have been placed statewide for several ears, both to detect beetles and to determine the extent of infestations once a beetle is detected. Unless otherwise indicated, the table indicates the number of Japanese beetles detected in the area of Orem, Utah. (Table adapted from Protecting Utah’s Agriculture: 2010 Insect Report, Utah Department of Agriculture and Food.)

 

-Cory Stanley, USU CAPS Coordinator

CAPS (Cooperative Agricultural Pest Survey) is a federal program, administered jointly by USDA-APHIS-PPQ and each state, whose purpose is early detection of invasive species that could threaten U.S. agriculture. In Utah, the program is cocoordinated by Cory Stanley (USU) and Clint Burfitt (UDAF).