Estimating the Effect of Bt Cotton on Input Expenditure and Yield: An Indian Perspective

Giridhar, B. J.; Velayudhan, Praveen Koovalamkadu; Singh, Alka

doi:10.1007/s40009-022-01102-0

Cited by 1 publication

(1 citation statement)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In 2019, 94% of all cotton planted in India was Bt cotton [ 6 ]. In the wake of pink bollworm resistance, the benefits of Bt cotton in India have been debated [ 74 , 75 ]. Factors favoring its continued high adoption may include limited availability of non-Bt cotton and the lack of practical resistance to Bt cotton in the major pest Helicoverpa armigera [ 76 ].…”

Section: Field Outcomes: Pink Bollworm and Bt Cotton In The Us China ...mentioning

confidence: 99%

Molecular Genetic Basis of Lab- and Field-Selected Bt Resistance in Pink Bollworm

Fabrick

Carrière

et al. 2023

Insects

View full text Add to dashboard Cite

Transgenic crops producing insecticidal proteins from the bacterium Bacillus thuringiensis (Bt) control some important insect pests. However, evolution of resistance by pests reduces the efficacy of Bt crops. Here we review resistance to Bt cotton in the pink bollworm, Pectinophora gossypiella, one of the world’s most damaging pests of cotton. Field outcomes with Bt cotton and pink bollworm during the past quarter century differ markedly among the world’s top three cotton-producing countries: practical resistance in India, sustained susceptibility in China, and eradication of this invasive lepidopteran pest from the United States achieved with Bt cotton and other tactics. We compared the molecular genetic basis of pink bollworm resistance between lab-selected strains from the U.S. and China and field-selected populations from India for two Bt proteins (Cry1Ac and Cry2Ab) produced in widely adopted Bt cotton. Both lab- and field-selected resistance are associated with mutations affecting the cadherin protein PgCad1 for Cry1Ac and the ATP-binding cassette transporter protein PgABCA2 for Cry2Ab. The results imply lab selection is useful for identifying genes important in field-evolved resistance to Bt crops, but not necessarily the specific mutations in those genes. The results also suggest that differences in management practices, rather than genetic constraints, caused the strikingly different outcomes among countries.

show abstract

Section: Field Outcomes: Pink Bollworm and Bt Cotton In The Us China ...mentioning

confidence: 99%

Molecular Genetic Basis of Lab- and Field-Selected Bt Resistance in Pink Bollworm

Fabrick

Carrière

et al. 2023

Insects

View full text Add to dashboard Cite

show abstract

Estimating the Effect of Bt Cotton on Input Expenditure and Yield: An Indian Perspective

Cited by 1 publication

References 7 publications

Molecular Genetic Basis of Lab- and Field-Selected Bt Resistance in Pink Bollworm

Molecular Genetic Basis of Lab- and Field-Selected Bt Resistance in Pink Bollworm

Contact Info

Product

Resources

About