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April 26, 2018Pest Management Science

Field‐evolved resistance of pink bollworm, Pectinophora gossypiella (Saunders) (Lepidoptera: Gelechiidae), to transgenic Bacillus thuringiensis (Bt) cotton expressing crystal 1Ac (Cry1Ac) and Cry2Ab in India

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Authors

VNVakudavath CB NaikSKSujit KumbhareSKS. Kranthi

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Overview

Surveillance study reveals field-evolved resistance to Cry1Ac and Cry2Ab cotton in pink bollworm populations, highlighting widespread transgenic crop vulnerability.

Key Points

  • Determine whether field populations of pink bollworm (Pectinophora gossypiella) in India have evolved resistance to transgenic Bt cotton expressing Cry1Ac and Cry2Ab toxins.
  • Monitored pink bollworm larval recovery from Bt-II cotton crops across major cotton-growing districts in central and southern India.
  • Conducted toxicity bioassays to determine lethal concentration (LC50) values for Cry1Ac and Cry2Ab toxins against collected larval populations.
  • Surveillance identified high recovery rates of pink bollworm larvae on Bt-II cotton in central and southern India.
  • Bioassays demonstrated elevated LC50 values for both Cry1Ac and Cry2Ab, confirming field-evolved resistance to Bt-I and Bt-II cotton cultivars.

Cite This Study

Naik et al. (2018) studied this question.

synapsesocial.com/papers/69dbaddf74ec1634218362dehttps://doi.org/10.1002/ps.5038
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Pink bollworm, Pectinophora gossypiella (Saunders) (Lepidoptera: Gelechiidae) survival on transgenic cotton in India2021 · 31 citations
  2. 2Field assessment of the effects of Cry1Ac and Cry1Ac + Cry2Ab Bt cotton against pink bollworm in Pakistan2026
  3. 3Identification and validation of SSR markers associated with Cry toxin resistance in Indian populations of cotton pink bollworm, Pectinophora gossypiella (Saunders)2026
  4. 4Insecticide Resistance in Pink Bollworm, <scp> <i>Pectinophora gossypiella</i> </scp> (Saunders) Across Cotton Growing Regions of India2026
  5. 5Regional environment variations and management practices likely influence gut gene expression in Bt-resistant pink bollworm (Pectinophora gossypiella) from the northern and southern parts of India2025