The result of insect bioassays demonstrated the resistance of the developed transgenic lines to one of the target insect pests. Total larval mortality and negligible feeding damage was observed on the transgenic plants compared to 15% larval mortality and heavy feeding damage on the control plants. Similar results have been re-ported on transgenic crops expressing different cry proteins. Trans-genic sorghum plants expressing a syntheticcry1Acgene showed 40% larval mortality of spotted stem bore