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February 24, 2021SHILAP Revista de lepidopterologíaOpen Access

Pink bollworm, Pectinophora gossypiella (Saunders) (Lepidoptera: Gelechiidae) survival on transgenic cotton in India

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Authors

VNV. Chinna Babu NaikSKSubbireddy KbSKS. Kranthi

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Overview

Bioassay study reveals high Cry toxin resistance and larval survival in field-collected pink bollworms, indicating widespread transgenic cotton control failure.

Key Points

  • To evaluate the survival, development, and Cry toxin resistance levels of pink bollworm (Pectinophora gossypiella) populations on Bt and non-Bt cotton across major Indian growing regions.
  • Sampled pink bollworm populations across multiple Indian cotton-growing states to measure field infestation percentages in flowers and green bolls.
  • Performed Cry1Ac and Cry2Ab concentration bioassays and whole-boll bioassays comparing transgenic BGII and non-Bt cotton.
  • Field infestation spanned 3.09–29.26% in flowers and 36–91.20% in green bolls, with late-season Rajkot populations demonstrating 371.8-fold resistance to Cry1Ac and 4214.3-fold resistance to Cry2Ab.
  • Susceptible larvae experienced 0% survival on BGII bolls versus 32–38% survival and 80% locule damage on non-Bt cotton.
  • Resistant field populations exhibited up to 36% survival on BGII bolls and induced up to 70% locule damage.

Cite This Study

Naik et al. (2021) studied this question.

synapsesocial.com/papers/69df2529d9e0feb21c591be2https://doi.org/10.1186/s41938-021-00393-7
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Also Consider

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

  1. 1Field‐evolved resistance of pink bollworm, <i>Pectinophora gossypiella</i> (Saunders) (Lepidoptera: Gelechiidae), to transgenic <i>Bacillus thuringiensis</i> (<i>Bt</i>) cotton expressing crystal 1Ac (Cry1Ac) and Cry2Ab in India2018 · 161 citations
  2. 2Field assessment of the effects of Cry1Ac and Cry1Ac + Cry2Ab Bt cotton against pink bollworm in Pakistan2026
  3. 3Insecticide Resistance in Pink Bollworm, <scp> <i>Pectinophora gossypiella</i> </scp> (Saunders) Across Cotton Growing Regions of India2026
  4. 4Identification and validation of SSR markers associated with Cry toxin resistance in Indian populations of cotton pink bollworm, Pectinophora gossypiella (Saunders)2026
  5. 5Refuge in bag: A smart strategy for outpacing bollworm resistance in Bt cotton2026