Produção Nacional
Revisado por pares
Efficacy of glyphosate applied using an electrostatic sprayer as affected by adjuvant and carrier volumes
2020; Sociedade Brasileira da Ciência das Plantas Daninhas; Volume: 38; Linguagem: Inglês
10.1590/s0100-83582020380100092
ISSN1806-9681
AutoresSaulo Felipe Brockes Campos, João Paulo Arantes Rodrigues da Cunha, Heli Heros Teodoro de Assunção, Thales Cassemiro Alves, César Henrique Souza Zandonadi, Ernane Miranda Lemes,
Tópico(s)Pesticide Residue Analysis and Safety
ResumoBackground: The use of electrostatic spray has the potential to optimize pesticide applications; however, further studies are required to verify its effectiveness. Objective: The objective of this work was to evaluate the electrostatic application system for the chemical control of weeds with glyphosate and adjuvant in different carrier volumes. Methods: The physicochemical properties of the spray solution, charge/mass relations, spray deposition on weeds, losses to the soil, effectiveness of weed control, and spray drift were evaluated. The field experiment was designed to have randomized blocks with four replications in a 2x2x2+2 factorial: the presence or not of electrostatic spray; with and without adjuvant (soybean lecithin + propionic acid); two carrier volumes (50 and 90 L ha-1); a control without applications and a conventional spray rate (150 L ha-1) for additional treatments. The study was performed in duplicate. Results: The electrostatic system energized the droplets during the application of glyphosate and adjuvant; however, this did not influence the deposition on the weeds, the losses to the soil, and the drift. The adjuvant improved the effectiveness of weed control in various situations, changed the spray solution properties, and reduced the losses due to drift. Conclusions: The adjuvant used proved to be an important tool in application technology. The effectiveness of weed control, in general, was not influenced by the electrostatic system.
Referência(s)