Multimedia Gallery
October 3, 2012
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A large natural population of evening primrose (yellow flowers) in Ithaca, New York.
A large natural population of evening primrose (yellow), which is a common plant in eastern North America.
Agrawal's team set up 16 identical plots. During each growing season for five years, eight of the plots were treated biweekly with an insecticide; the other eight were controls.
Credit: Anurag Agrawal
Images credited to the National Science Foundation, a federal agency, are in the public domain. The images were created by employees of the United States Government as part of their official duties or prepared by contractors as "works for hire" for NSF. You may freely use NSF-credited images and, at your discretion, credit NSF with a "Courtesy: National Science Foundation" notation.
Additional information about general usage can be found in Conditions.
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Related story: Why We Need Insects--Even "Pesky" Ones