Interrelationship between potassium rates and the efficiency of Bt genes in the control of Spodoptera frugiperda

Authors

  • Marcelo Macedo Faria Universidade Estadual de Goiás, Unidade Universitária de Ipameri, Rodovia GO 330, Km 241, Anel Viário, s/no, CEP 75780-000 Ipameri, GO.
  • Pedro Henrique Nascimento Cintra Universidade Estadual de Goiás, Unidade Universitária de Ipameri, Rodovia GO 330, Km 241, Anel Viário, s/no, CEP 75780-000 Ipameri, GO.
  • Víctor Alves Amorim Universidade Federal de Viçosa, Centro de Ciências Biológicas e da Saúde, Departamento de Biologia, Avenida Peter Henry Rolfs, s/no, Campus Universitário, CEP 36570-000 Viçosa, MG.
  • Thiago Souza Campos Universidade Estadual Paulista Júlio de Mesquita Filho, Faculdade de Ciências Agrárias e Veterinárias, Departamento de Ciências Agrárias, Câmpus de Jaboticabal, Via de Acesso Professor Paulo Donato Castellane, s/no, CEP 14884-900 Jaboticabal, SP.
  • Ednaldo Cândido Rocha Universidade Estadual de Goiás, Unidade Universitária de Ipameri, Rodovia GO 330, Km 241, Anel Viário, s/no, CEP 75780-000 Ipameri, GO.
  • Fabricio Rodrigues Universidade Estadual de Goiás, Unidade Universitária de Ipameri, Rodovia GO 330, Km 241, Anel Viário, s/no, CEP 75780-000 Ipameri, GO.

Keywords:

Zea mays, caterpillar, damage, pest, transgenics

Abstract

The objective of this work was to identify the effect of potassium rates on Bt transgenic resistance and damage caused by Spodoptera frugiperda in corn plants at different developmental stages. The experimental design was a randomized complete block in a 3x6 factorial arrangement, with three potassium rates (0, 45, and 90 kg ha-1) and six corn hybrids (20A55Hx, 30A77PW, AG1051, MG652PW, NS90VTPro2, and NS92VTPro), with three replicates. The hybrids were evaluated through the analysis of canonical variables. With low potassium rates, the effectiveness of the corn hybrids in controlling the S. frugiperda caterpillar decreases in the different phenological stages. The use of the Bt technology is more efficient under an adequate potassium rate of 90 kg ha-1 KCl.

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Published

2024-03-22

How to Cite

Faria, M. M., Cintra, P. H. N., Amorim, V. A., Campos, T. S., Rocha, E. C., & Rodrigues, F. (2024). Interrelationship between potassium rates and the efficiency of <i>Bt</i> genes in the control of <i>Spodoptera frugiperda</i>. Pesquisa Agropecuaria Brasileira, 58(AA), e03241. Retrieved from https://apct.sede.embrapa.br/pab/article/view/27472

Issue

V.58, Jan./Dec., 2023 :Continuos publication

Section

ENTOMOLOGY