Response of larval Ephestia kuehniella (Lepidoptera: Pyralidae) to individual Bacillus thuringiensis kurstaki toxins and toxin mixtures (original) (raw)

To determine the optimal ratio of Bacillus thuringiensis delta-endotoxins Cry1Aa, Cry1Ac, and Cry2Aa bioinsecticide formulations, and for development of novel biopesticides based on B. thuringiensis, the toxicities of these three proteins, individually and in combinations, have been determined against the Mediterranean Xour moth, Ephestia kuehniella. While B. thuringiensis crystals containing a mixture of Cry1Aa, Cry1Ac, and Cry2Aa displayed toxicity with an LC 50 and LC 95 of 109.7 and 463.0 ng of toxin per mg Xour, respectively, when used individually or in combination, Cry1Aa, Cry1Ac, and Cry2Aa showed signiWcantly lower activity. Thus, it is clear that synthesis of these toxins together in the wild strain is more eYcient than a mixture of them. 

Sign up for access to the world's latest research.

checkGet notified about relevant papers

checkSave papers to use in your research

checkJoin the discussion with peers

checkTrack your impact