Season-long variation in expression of Cry1Ac gene and efficacy of Bacillus thuringiensis toxin in transgenic cotton against Helicoverpa armigera (Lepidoptera: Noctuidae).

Abstract excerpt

The insertion of genes encoding insecticidal Cry1A delta-endotoxins from the bacterium Bacillus thuringiensis Berliner variety kurstaki (Bt) into varieties of cotton (Gossypium spp.) was undertaken to assist in the control of a range of lepidopteran pests. In Australia, where Helicoverpa armigera (Hübner) and Helicoverpa punctigera (Wallengren) are major pests, the level of control is useful, but not complete,...

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