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United States Department of Agriculture

Agricultural Research Service

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Image Number K9243-1

To assess resistance to Bt proteins, entomologist Douglas Sumerford weighs a cotton bollworm larva that was exposed to the Bt-insecticidal protein Cry1Ac for 12 days.

Photo by Peggy Greb.

640 pixels wide: (k9243-1.jpg)

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Last Modified: 8/13/2016
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