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Early resistance of Helicoverpa armigera (Hubner) to Bacillus thuringiensis and its relation to the effect of transgenic cotton lines expressing BT toxin on the insect



Early resistance of Helicoverpa armigera (Hubner) to Bacillus thuringiensis and its relation to the effect of transgenic cotton lines expressing BT toxin on the insect



Acta Entomologica Sinica 41(1): 8-14



Susceptible bioassay base line and discrimination concentrations were determined for Bacillus thuringiensis (B.t.) on a susceptible (SUS1) strain of Helicoverpa armigera using the diet infection method. Susceptibilities to commercial B.t. subsp. kurstaki formulations in newly-hatched larvae of H. armigera collected from 6 counties of 5 provinces in China were tested in 1995.

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Accession: 003101482

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