Yield losses in off-season corn crop due to stalk rot disease

Authors

  • Rodrigo Véras da Costa Embrapa Milho e Sorgo, Laboratório de Fitopatologia, Rodovia MG-424, Km 65, Caixa Postal 151, CEP 35701-970 Sete Lagoas, MG.
  • Jones Simon Embrapa Pesca e Aquicultura, Prolongamento da Avenida NS 10, cruzamento com a Avenida LO 18, sentido Norte, loteamento Água Fria, CEP 77008-900 Palmas, TO.
  • Luciano Viana Cota Embrapa Milho e Sorgo, Laboratório de Fitopatologia, Rodovia MG-424, Km 65, Caixa Postal 151, CEP 35701-970 Sete Lagoas, MG.
  • Dagma Dionísia da Silva Embrapa Milho e Sorgo, Laboratório de Fitopatologia, Rodovia MG-424, Km 65, Caixa Postal 151, CEP 35701-970 Sete Lagoas, MG.
  • Rodrigo Estevam Munhoz de Almeida Embrapa Pesca e Aquicultura, Prolongamento da Avenida NS 10, cruzamento com a Avenida LO 18, sentido Norte, loteamento Água Fria, CEP 77008-900 Palmas, TO.
  • Fabrício Eustáquio Lanza Embrapa Milho e Sorgo, Laboratório de Fitopatologia, Rodovia MG-424, Km 65, Caixa Postal 151, CEP 35701-970 Sete Lagoas, MG.
  • Bruno Cocco Lago Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz, Avenida Pádua Dias, no 11, Caixa Postal 9, CEP 13418-900 Piracicaba, SP.
  • Alan Alves Pereira Embrapa Pesca e Aquicultura, Prolongamento da Avenida NS 10, cruzamento com a Avenida LO 18, sentido Norte, loteamento Água Fria, CEP 77008-900 Palmas, TO.
  • 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.
  • José Edson Fontes Figueiredo Embrapa Milho e Sorgo, Laboratório de Fitopatologia, Rodovia MG-424, Km 65, Caixa Postal 151, CEP 35701-970 Sete Lagoas, MG.

DOI:

https://doi.org/10.1590/S1678-3921.pab2019.v54.26487

Keywords:

Fusarium graminearum, Zea mays, lodging, stalk breakage, stem disease

Abstract

The objective of this work was to assess yield losses due to stalk rot in corn (Zea mays) hybrids, as well as to identify the main pathogenic fungi responsible for the disease during the off-season, in the state of Tocantins, Brazil. Two field experiments were carried out, one with five hybrids, in 2015, and another with four, in 2016. Ears of healthy and stalk rot-infected plants were collected from each plot, at harvest. Ear size, grain and ear weights, and grain moisture content were measured. From each diseased plant, a stalk piece with two to three nodes was removed for pathogen identification and quantification. The most common pathogens were: Fusarium graminearum, Stenocarpella maydis, and Macrophomina phaseolina. All yield parameters were significantly lower in stalk rot-infected plants, with average losses of 30.6%, in 2015, and of 34.3% in 2016. The highest yield losses are observed in hybrids with the highest grain/ear weight ratio.

Downloads

Published

2019-05-09

How to Cite

Costa, R. V. da, Simon, J., Cota, L. V., Silva, D. D. da, Almeida, R. E. M. de, Lanza, F. E., … Figueiredo, J. E. F. (2019). Yield losses in off-season corn crop due to stalk rot disease. Pesquisa Agropecuaria Brasileira, 54(X), e00283. https://doi.org/10.1590/S1678-3921.pab2019.v54.26487

Issue

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

Section

PHYTOPATHOLOGY