Field efficacy of Bt cotton containing events DAS-21023-5 × DAS-24236-5 × SYN-IR102-7 against lepidopteran pests and impact on the non-target arthropod community in Brazil

PLoS One. 2021 May 4;16(5):e0251134. doi: 10.1371/journal.pone.0251134. eCollection 2021.

Abstract

The efficacy and non-target arthropod effects of transgenic DAS-21023-5 × DAS-24236-5 × SYN-IR102-7 Bt cotton, expressing proteins Cry1Ac, Cry1F and Vip3Aa19, was examined through field trials in Brazil. Fifteen field efficacy experiments were conducted from 2014 through the 2020 growing season across six different states in Brazil to evaluate performance against key lepidopteran pests through artificial infestations of Chrysodeixis includens (Walker), Spodoptera frugiperda (J.E. Smith,1797), Spodoptera cosmioides (Walker, 1858) and Chloridea virescens (F., 1781), and natural infestations of Alabama argillacea (Hübner) and S. frugiperda. The impact of this Bt cotton technology on the non-target arthropod community in Brazilian cotton production systems was also assessed in a multi-site experiment. DAS-21023-5 × DAS-24236-5 × SYN-IR102-7 cotton significantly reduced the feeding damage caused by S. frugiperda, S. cosmioides, C. includens, C. virescens and A. argillacea, causing high levels of mortality (greater than 99%) to all target lepidopteran pests evaluated during vegetative and/or reproductive stages of crop development. Non-target arthropod community-level analyses confirmed no unintended effects on the arthropod groups monitored. These results demonstrate the value of transgenic Bt cotton containing event DAS-21023-5 × DAS-24236-5 × SYN-IR102-7 for consideration as part of an integrated approach for managing key lepidopteran pests in Brazilian cotton production systems.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • 4-Acetamido-4'-isothiocyanatostilbene-2,2'-disulfonic Acid / analogs & derivatives*
  • 4-Acetamido-4'-isothiocyanatostilbene-2,2'-disulfonic Acid / metabolism
  • Animals
  • Arthropods / growth & development*
  • Brazil
  • Gossypium / metabolism*
  • Gossypium / parasitology*
  • Insect Control
  • Larva / growth & development
  • Moths / growth & development
  • Pest Control, Biological / methods
  • Plant Leaves / parasitology
  • Plants, Genetically Modified / parasitology
  • Spodoptera / growth & development

Substances

  • 4-Acetamido-4'-isothiocyanatostilbene-2,2'-disulfonic Acid
  • amsonic acid

Grants and funding

No independent third party funding was used in the research for this article. Corteva Agriscience provided salary to the authors who are employees of Corteva Agriscience. Corteva Agriscience authors participated in the study design which was submitted and approved by the Brazilian government authority. Also, authors participated in the decision to publish, and the preparation of the manuscript. This does not alter our adherence to PLOS ONE policies on sharing data and materials.