Pam Roberts, a plant pathologist with the University of Florida’s Institute of Food and Agricultural Sciences, inspects watermelon plants in Immokalee (6/22/06). Roberts and other UF researchers believe they’ve pinned down the silverleaf whitefly as the pest responsible for ruining about $60 million worth of watermelon crops in the last four years.

(AP photo/University of Florida/IFAS/Thomas Wright)
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