Abstract
The possibility that suppressing the tobacco budworm, Heliothis virescens (F.), by means of genetic control will lead to short run crop yield sacrifices is examined. A simulation model of budworm/backcross population dynamics is used to investigate the effects of backcross releases which are too small or improperly timed. Apart from its potential for ultimate long-term suppression of the tobacco budworm, adverse short-term effects on crop yields are not likely to be a serious problem with a genetic control program. Furthermore, backcross release appears to have some potential as a substitute for chemical pesticides during the period prior to budworm elimination by genetic control.
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