Incidence of corn stunt disease in off-season corn hybrids in different sowing seasons

Authors

  • Rodrigo Véras da Costa Embrapa Milho e Sorgo, Rodovia MG-424, Km 45, Caixa Postal 151, CEP 35701-970 Sete Lagoas, MG.
  • Dagma Dionísia da Silva Embrapa Milho e Sorgo, Rodovia MG-424, Km 45, Caixa Postal 151, CEP 35701-970 Sete Lagoas, MG.
  • Luciano Viana Cota Embrapa Milho e Sorgo, Rodovia MG-424, Km 45, Caixa Postal 151, CEP 35701-970 Sete Lagoas, MG.
  • Leonardo José Motta Campos Embrapa Soja, Rodovia Carlos João Strass, s/no, Acesso Orlando Amaral, Distrito de Warta, Caixa Postal 231, CEP 86001-970 Londrina, PR.
  • Rodrigo Estavam Munhoz de Almeida Embrapa Pesca e Aquicultura, Prolongamento da Avenida NS 10, Cruzamento com a Avenida LO 18, Sentido Norte, Loteamento Água Fria, Caixa Postal 90, CEP 77008-900 Palmas, TO.
  • Fernanda Pinheiro Bernardes Faculdade Católica do Tocantins, Unidade II, Rodovia TO-050, Loteamento Coqueirinho, Lote 7, s/no, CEP 77000-000 Palmas, TO.

DOI:

https://doi.org/10.1590/S1678-3921.pab2019.v54.26636

Keywords:

Dalbulus maidis, Zea mays, genetic resistance, Mollicutes, phytoplasma, spiroplasma

Abstract

The objective of this work was to evaluate the incidence of corn stunt disease and its effects on the grain yield of off-season corn (Zea mays) hybrids in different sowing seasons. The experiment was conducted in three sites in the state of Tocantins, in different sowing seasons, in a randomized complete block design, with 30 hybrids (treatments) and three replicates. Corn stunt disease incidence was assessed at 80 days after emergence, varying between hybrids and sowing seasons, with a marked effect of sowing season. The most resistant hybrids were: MG652 PW, Penta VIP, MG600 PW, NS90 PRO2, LG3040 VIP3, MG580 PW, and Defender VIP. The Fórmula VIP2 hybrid was the most susceptible to corn stunt disease. The incidence of the disease increased in the later sowing seasons, causing significant declines in grain yield. The most productive hybrids were: MG580 PW, SYN 5T78 VIP, 2B810 PRO, MG600 PW, Supremo VIP, 2B512 PW, NS92 PRO2, P30S31 VYH, MG652 PW, Penta VIP, SX5371 VIP3, and LG6036 PRO. Corn hybrids vary greatly in their resistance to corn stunt disease, and, the later the sowing season, the higher the disease incidence and the lower the grain yield.

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Published

2019-12-11

How to Cite

Costa, R. V. da, Silva, D. D. da, Cota, L. V., Campos, L. J. M., Almeida, R. E. M. de, & Bernardes, F. P. (2019). Incidence of corn stunt disease in off-season corn hybrids in different sowing seasons. Pesquisa Agropecuaria Brasileira, 54(X), e00872. https://doi.org/10.1590/S1678-3921.pab2019.v54.26636

Issue

V.54, Jan./Dec., 2019 :Continuos publication

Section

PHYTOPATHOLOGY