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The preliminary report on laboratory resistance of cotton bollworm (Helicoverpa armigera) to Bacillus thuringiensis

Daoshou Qiu

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Abstract

The resistant strains of cotton bollworm (Helicoverpa armigera) to the insecticidal crystal proteins (ICPs) of Bacillus thuringiensis strains YBT-1520 and HD-73 were selected in laboratory. After 10 generations selection, the resistance rate of YBT-1520 and HD-73 resistant strains were 1.30 and 2.07, respectively. The preliminary resistance developing trend that could be drawn from the result was that the resistance development of H. armigera against multigene δ-endotoxin (YBT-1520 ICPs) was much lower than that of it against single gene δ-endotoxin (HD-73 ICPs).

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What this paper is about

The resistant strains of cotton bollworm (Helicoverpa armigera) to the insecticidal crystal proteins (ICPs) of Bacillus thuringiensis strains YBT-1520 and HD-73 were selected in laboratory. After 10 generations selection, the resistance rate of YBT-1520 and HD-73 resistant strains were 1.30 and 2.07, respectively. The preliminary resistance developing trend that could be drawn from the result was that the resistance development of H. armigera against multigene δ-endotoxin (YBT-1520 ICPs) was much lower than that of it against single gene δ-endotoxin (HD-73 ICPs).

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Available abstract

The resistant strains of cotton bollworm (Helicoverpa armigera) to the insecticidal crystal proteins (ICPs) of Bacillus thuringiensis strains YBT-1520 and HD-73 were selected in laboratory. After 10 generations selection, the resistance rate of YBT-1520 and HD-73 resistant strains were 1.30 and 2.07, respectively. The preliminary resistance developing trend that could be drawn from the result was that the resistance development of H. armigera against multigene δ-endotoxin (YBT-1520 ICPs) was much lower than that of it against single gene δ-endotoxin (HD-73 ICPs).

Key concepts: Helicoverpa armigera, Bacillus thuringiensis, Biology, Pink bollworm, Bollworm, Biotechnology, Veterinary medicine, Larva

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