FERTIACTYL® POST IN THE DECREASE OF PHYTOTOXICITY OF HERBICIDE ROUNDUP READY® IN SOYBEAN PLANTATIONS

  • Gilson Araújo de Freitas
  • Fernanda Weber
  • Antônio Carlos Martins dos Santos
  • Jefferson Santana da Silva Carneiro
  • Rubens Ribeiro da Silva
Keywords: Glycine max L., Weed control, Low rainfall rate, Brazilian savannah

Abstract

In spite of resistance under certain conditions, genetically modified soybean revealed damages caused by the herbicide Roundup Ready. The capacity of Fertiactyl® Pós technology in the reduction of the phytotoxicity of the herbicide Roundup Ready® on the production of soybeans is investigated. Experimental design comprised randomized blocks with five replications and three replicates in each replication. The five treatments comprised the application of the foliar fertilizers Fertiactyl® Pós at doses 0; 0.4; 0.8; 1.2 and 1.6 L ha-1 plus herbicide Roundup Ready®. The herbicide was applied at a fixed dose of 2.0 L ha-1 , with the following treatments: T1 – Roundup Ready® + 0 L ha-1 Fertiactyl® Pós; T2 – Roundup Ready® + 0.4 L ha-1 Fertiactyl® Pós; T3 – Roundup Ready® + 0.8 L ha-1 Fertiactyl® Pós; T4 – Roundup Ready® + 1.2 L ha-1 Fertiactyl® Pós; and T5 – Roundup Ready® + 1.6 L ha-1 Fertiactyl® Pós. Production indexes, such as plant height (cm), root length (cm) and the weight of 100 grains (g), were not significant at increasing doses of foliar fertilizer. Amount of pods per plant and productivity (sack ha-1) increased with Fertiactyl Pós®. Fertiactyl® Pós application reduced the phytotoxic effect of the herbicide Roundup Ready® and hydric stress on soybean plants Pioneer 98Y30® with an increase in productivity by at least 0.7 sacks ha-1 at 0.45 L ha-1 of Fertiactyl® Post, after 27 days without any rain. Dose 0.4 L ha-1 recommended by the manufacturer should be the highest dose used in soybean plantations.

Author Biographies

Gilson Araújo de Freitas
Engenheiro Agrônomo, Doutor em Produção Vegetal, Universidade Federal do Tocantins, UFT, Gurupi (TO), Brasil.
Fernanda Weber
Engenheira Agrônoma. Supervisora de Marketing - Timac Agro Brasil.
Antônio Carlos Martins dos Santos
Engenheiro Agrônomo, Doutorando em Produção Vegetal, Universidade Federal do Tocantins, UFT, Gurupi (TO), Brasil
Jefferson Santana da Silva Carneiro
Discente de Agronomia, Doutorando em Solos e Nutrição de Plantas; Universidade Federal do Tocantins, UFLA, Lavras (MG), Brasil.
Rubens Ribeiro da Silva
Docente DSc. em Solos e Nutrição de Plantas, Universidade Federal do Tocantins, UFT, Gurupi (TO), Brasil.
Published
2018-03-29
Section
Agrobusiness