Although we share the general concerns about pest resistance to transgenic crops discussed by F. Huang et al. [Reports, “Inheritance of resistance to Bacillus thuringiensis toxin (Dipel ES) in the European corn borer,” 7 May 1999, p. 965], reconsideration of several aspects of their report is warranted. They examined resistance to Dipel ES, a commercial formulation of B. thuringiensis(Bt) toxin, in a laboratory-selected strain of the European corn borer, a major lepidopteran pest.Bt genes encoding insecticidal proteins have been introduced into the genome of maize to provide protection from larvae of the European corn borer. The transgenic hybrids are called Bt maize.
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Tabashnik et al. (2000) studied this question.
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