A vip3Ba gene reconstructed for plant expression was used in transforming cowpea via Agrobacterium tumefaciens. Transgenic lines expressing Vip3Ba protein were used in insect feeding trials to assess protection against Maruca and were found to be completely protected from this pest. We propose that the vip-cowpea lines could be combined with existing cry-transgenic cowpea to introgress this additional resistance trait and thus avoid or greatly delay the development of resistance in Maruca.
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