What question did this study set out to answer?

Determine whether repeated foliar applications of Bacillus thuringiensis commercial formulations cause resistance in field populations of the diamondback moth.

October 1, 1990Journal of Economic EntomologyOpen Access

Field Development of Resistance to Bacillus thuringiensis in Diamondback Moth (Lepidoptera: Plutellidae)

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Authors

BTBruce E. TabashnikUniversity of Arizona NCNancy L. CushingUniversity of Illinois Chicago NFNaomi FinsonUniversity of Hawaiʻi at Mānoa

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Implication

Laboratory bioassay reveals high Bacillus thuringiensis resistance in field diamondback moths, highlighting risks for genetically engineered insect-resistant crops.

Key Points

Determine whether repeated foliar applications of Bacillus thuringiensis commercial formulations cause resistance in field populations of the diamondback moth.
Conducted comparative laboratory bioassays on diamondback moth (Plutella xylostella) larvae collected from repeatedly treated agricultural fields and two susceptible laboratory colonies.
Calculated LC50 and LC95 levels and measured larval mortality rates under recommended field application concentrations of the B. thuringiensis subsp. kurstaki spore-crystal protein complex.
Field populations treated repeatedly with B. thuringiensis exhibited LC50 and LC95 values 25 to 33 times higher than those of susceptible laboratory colonies.
Larval mortality at the standard field application rate was only 34% to 35% in resistant field populations, compared to 90% to 100% in susceptible laboratory controls.

Cite This Study

Tabashnik et al. (1990) studied this question.

synapsesocial.com/papers/6a8262ff363a6f5be926fd5e https://doi.org/10.1093/jee/83.5.1671

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Implication

Laboratory bioassay reveals high Bacillus thuringiensis resistance in field diamondback moths, highlighting risks for genetically engineered insect-resistant crops.

Field Development of Resistance to Bacillus thuringiensis in Diamondback Moth (Lepidoptera: Plutellidae)

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Implication

Key Points

Cite This Study

Field Development of Resistance to Bacillus thuringiensis in Diamondback Moth (Lepidoptera: Plutellidae)

Discussion

Member takes

Implication

Key Points

Cite This Study

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