Interaction between corn genotypes with Bt protein and management strategies for Spodoptera frugiperda (Lepidoptera: Noctuidae)

Authors

  • Cinthia Silva
  • Lígia Paiva
  • Fernanda Correa University of Goias State, Department of Agronomy, Ipameri, Goiás 75780-000, Brazil
  • Franciele Silva
  • Ana Paula Pelosi
  • Marcio da Silva Araujo
  • André Cirilo de Sousa Almeida Instituto Federal Goiano Campus Urutaí
  • Flávio Jesus

Abstract

Insect pests, including caterpillars, cause losses in maize (Zea mays L.; Poaceae) which is one of the most important agricultural crops in the world. The objective of this study was to evaluate the management of Spodoptera frugiperda Smith & Abbot (Lepidoptera: Noctuidae) with transgenic and conventional maize genotypes. The experiments were conducted in the field in summer crops from the seasons 2014/2015 and 2015/2016 in a randomized complete block design with sub-subdivided plots represented by: control (no control), chemical control (methomyl + diflubenzurom), Integrated Pest Management–spinosade, and biological control (Trichogramma pretiosum Riley; Hymenoptera: Trichogrammatidae) with 3 maize genotypes (Impact VIP 3, P3862 HX, and BM 3061) and 4 replications. Control and reduction of S. frugiperda damage were higher in the Impact VIP 3 corn genotype. The crop yield was higher (11,838.59 kg per h-1), and the damage to the ears was lower in the biological control with T. pretiosum.

Resumo

Pragas, incluindo lagartas, causam redução na produção em milho (Zea mays L.; Poaceae) uma das culturas mais importantes no mundo. O objetivo deste estudo foi avaliar o manejo de lepidopteras em genótipos de milho transgênico e convencional. Os experimentos foram conduzidos em campo, nas safras de verão nos períodos de 2014/2015 e 2015/2016 em delineamento de blocos casualizados em parcelas sub-subdividida representada por controle (sem controle), controle químico (methomyl + diflubenzurom), manejo integrado de pragas–spinosade), e controle biológico (Trichogramma pretiosum Riley; Hymenoptera: Trichogrammatidae) em três genótipos de milho (Impact VIP 3, P3862 HX, and BM 3061) em quatro repetições. Controle e redução de danos foi maior no genótipo Impact VIP 3. A produtividade foi alta (11,838.59 kg para h-1) e os danos foram menores no controle biológico com T. pretiosum.

Key Words: fall armyworm; egg parasitoids; host plant resistance to insects; Zea mays

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Published

2020-02-03

Issue

Vol. 102, No. 4 (December 2019)

Section

Research Papers

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