Page Banner

United States Department of Agriculture

Agricultural Research Service

Electrodes Help Find Beetles’ Favorite Scents / February 7, 2000 / News from the USDA Agricultural Research Service

Agricultural Research Service
U.S. Department of Agriculture
ARS News and Information Search News and Info Science for Kids Image Gallery Agricultural Research Magazine Publications and Newsletters News Archive News and Info home ARS News and Information
Latest news | Subscribe

This Colorado potato beetle is being offered a choice between a chemical attractant and potato leaf aromas and is moving toward the attractant.

More information on this research in Agricultural Research.

Electrodes Help Find Beetles’ Favorite Scents

By Tara Weaver-Missick
February 7, 2000

Several chemical scents that attract Colorado potato beetles have been discovered by Agricultural Research Service scientists. They attached tiny electrodes to the tips of beetles’ antennae so they could monitor the pests’ sensitivity to the scent of potatoes.

Colorado potato beetles are the potato crop’s most destructive pest, costing growers millions of dollars in chemical control and crop losses. For at least 73 years, scientists have been searching for the scent that attracts this yellow and black multi-colored bug to solanaceous plants.

Entomologist Joseph C. Dickens with ARS’ Vegetable Laboratory in Beltsville, Md., made the find while exposing the insects to different potato leaf aromas and allowing them to choose the scents they preferred.

When Dickens offered the beetles a choice between one of the scents and potato foliage, the beetles were terribly confused and could not tell the difference between the two attractive scents. He monitored the insects’ responses to both “real” and synthetic scents.

In preliminary field tests, the beetles were captured with a synthetic lure containing a mixture of these compounds. According to Dickens, no one had ever caught a Colorado potato beetle with a synthetic lure before. They have identified at least five different synthetic blends that are attractive to the insects in laboratory tests--and that may be attractive in the field as well. From this research, naturally-occurring chemical signals could be used to monitor and control pest populations.

Dickens is also investigating how chemical scents, which are emitted when the beetles chew on plants, might help attract potato beetle predators.

ARS is the chief scientific agency of the U.S. Department of Agriculture.

More information on this research appears in the February issue of Agricultural Research magazine.

Scientific contact: Joseph C. Dickens, ARS Vegetable Laboratory, Beltsville, Md., phone (301) 504- 8957, fax (301) 504-5555, jdickens@asrr.arsusda.gov.

Top | News Staff | Photo Staff

E-mail the web team Privacy and other policies Site map About ARS Information Staff Bottom menu

Home | News | Pubs | Magazine | Photos | Sci4Kids | Search
About ARS Info | Site map | Policies | E-mail us

Last Modified: 1/3/2002
Footer Content Back to Top of Page