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The role of glyphosate in RR soybean production and seed quality

2014; Sociedade Brasileira da Ciência das Plantas Daninhas; Volume: 32; Issue: 2 Linguagem: Inglês

10.1590/s0100-83582014000200018

1806-9681

Leandro Paiola Albrecht, Alfredo Júnior Paiola Albrecht, Alessandro Lucca Braccini, Rubem Silvério de Oliveira, Luiz Henrique Saes Zobiole, Marizângela Rizzatti Ávila,

Soybean genetics and cultivation

This study aimed to evaluate the production components and quality of RR soybean seeds (Roundup Ready®), after application of increasing rates of gliphosate. Field experiments were conducted in Mandaguari, Paraná, during two seasons. Treatments consisted of five doses of glyphosate. All applications were performed once, between development stages V4 and V5. The experiment was arranged in a completely randomized block design, with four replicates. Data were subjected to analysis of variance, and when significant, t-tests and a regression analysis were applied to verify the behavior of the treatments. The physiological and sanitary quality, yield and mass of one thousand seeds were evaluated. The results indicated that seed quality can be adversely affected by glyphosate, and also showed a probable reduction in yield components with increasing rates of application.