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ARS Home Office of Communications Images Photos Sep10





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Image Number D1907-3 Entomologists Aaron Gassmann (left), of Iowa State University, and Tom Sappington, with ARS, observe magnified western corn rootworm larvae to measure the size of their head capsules. Larvae exposed to *Bt*corn roots may grow more slowly than unexposed larvae, and head capsule width is an accurate indicator of larval growth stage.  Photo by Stephen Ausmus.  640 pixels wide: (d1907-3.jpg)   Please visit our Image Gallery


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