Figure 1.

Leaf bioassay of control (left) and Cry2Aa2 chloroplast transgenic tobacco leaves (right) assayed against various tobacco budworm strains: YDK, susceptible (top); CrylAc-resistant (middle); Cry2Aa2-resistant (bottom). Photographs were taken on the fourth day of the assay.

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Photo courtesy of William W. Moar
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