Phytosanitary risks and agronomic performance of soybeans associated with spatial arrangements of plants

  • Eduardo Lima do Carmo Faculdade de Agronomia / Universidade de Rio Verde
  • Alessandro Guerra da Silva Faculdade de Agronomia / Universidade de Rio Verde
  • Guilherme Braga Pereira Braz Faculdade de Agronomia / Universidade de Rio Verde
  • Sergio de Oliveira Procópio Embrapa Tabuleiros Costeiros
  • Gustavo André Simon Faculdade de Agronomia / Universidade de Rio Verde
  • Antonio Germano Carpim Rocha Faculdade de Agronomia / Universidade de Rio Verde.
  • Luiz Carlos Barcellos Departamento de Agronomia / Universidade Federal de Goiás
Keywords: Application technology., Glycine max., Phenotypic plasticity., Sowing systems., Yield components

Abstract

Soybeans sowing in different plants’ spatial distribution can influence the phytosanitary management of this crop and, consequently, impact on grains yield. This study was carried out to evaluate the effect of plants arrangements on infestation and control of caterpillars, the deposition of spray syrup as well as assess the agronomic performance of soybean cultivated in the Brazilian Cerrado. The assay was performed during two consecutive seasons in a randomized complete block design with four replications. Soybean cultivation was implemented in 0.50 m spacing between rows, crossed (0.50 m x 0.50 m), twin rows (0.25 m / 0.75 m), and narrow (0.25 m). In the reproductive stage of plants, both crossed and narrow arrangements showed higher caterpillars’ incidence. There was a more evident risk of caterpillar incidence in arrangements that promoted better equidistance among plants. This risk was mitigated when taking into account both control and overlap of syrup, which could be incremented into inferior canopy with the enhancement of application rate. The increase in application rate from 75 to 150 L ha-1 promoted superior spray deposition volumes. Increases in grain yield was noted in the narrow arrangement.

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Author Biographies

Eduardo Lima do Carmo, Faculdade de Agronomia / Universidade de Rio Verde
Professor da Faculdade de Agronomia da Universidade de Rio Verde.
Alessandro Guerra da Silva, Faculdade de Agronomia / Universidade de Rio Verde
Professor da Faculdade de Agronomia da Universidade de Rio Verde.
Guilherme Braga Pereira Braz, Faculdade de Agronomia / Universidade de Rio Verde
Professor da Faculdade de Agronomia da Universidade de Rio Verde.
Sergio de Oliveira Procópio, Embrapa Tabuleiros Costeiros
Pesquisador da Embrapa Tabuleiros Costeiros.
Gustavo André Simon, Faculdade de Agronomia / Universidade de Rio Verde
Professor da Faculdade de Agronomia da Universidade de Rio Verde.
Antonio Germano Carpim Rocha, Faculdade de Agronomia / Universidade de Rio Verde.
Discente do Programa de Pós-graduação em Produção Vegetal da Universidade de Rio Verde.
Luiz Carlos Barcellos, Departamento de Agronomia / Universidade Federal de Goiás
Professor do Departamento de Agronomia da Universidade Federal de Goiás.
Published
2019-04-16
Section
Agricultural Sciences