Interference of different droplet size and spraying volume on the atrazine and nicosulfuron mixture performance on weed competition in the maize-brachiaria (Urochloa ruziziensis) intercrop

• Grant number: 20/07059-4
• Support Opportunities: Scholarships in Brazil - Master
• Start date: March 01, 2021
• End date: February 28, 2023
• Field of knowledge: Agronomical Sciences - Agronomy - Crop Science
• Principal Investigator: Evandro Pereira Prado
• Grantee: Arthur Duarte Rodrigues Neto
• Host Institution: Faculdade de Ciências Agrárias e Tecnológicas. Universidade Estadual Paulista (UNESP). Campus de Dracena. Dracena , SP, Brazil

Abstract

The yield of the corn-brachiaria consortium can be optimized by managing the weed competition with the application of underdoses of herbicides selective to the corn crop, however, there is no research analyzing the correlation of the droplet size and application volume variables in this management. Based on this, it is proposed to carry out five experiments: (1) elaboration of dose-response curves in Urochloa ruziziensis, of the herbicides atrazine and nicosulfuron, to determine a working dose and, from that; (2) quantify the deposition and coverage provided by the application in eight treatments (four classes of drops - fine, medium, coarse and very coarse × two application volumes - 70 L ha-1 and 150 L ha-1) on artificial targets (Petri dishes and water sensitive cards); (3) verify the characteristics of the droplet spectra, using the image droplet analysis method (PDIA); (4) quantify the drift potential in controlled conditions (wind tunnel) and (5) perform a field experiment, in simultaneous duplicate, with the objective of verifying the interference of treatments in the management of weed competition and the effects on the consortium's yield by analysis of variables: level of weed control, brachiaria dry mass yield and corn grain yield. Based on the joint analysis of the experimental data obtained, it will be possible to point to an adequate configuration of variables that guarantee profitability, economy and environmental safety in the management of weed competition in the corn-brachiaria consortium. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

ARTHUR DUARTE RODRIGUES NETO; NAIANE ANTUNES ALVES RIBEIRO; FAGNER ANGELO DA SILVA E OLIVEIRA; GLAUCIA AMORIM FARIA; EVANDRO PEREIRA PRADO. Características do espectro de gotas e potencial de deriva de diferentes classes de gotas e volumes de aplicação da mistura de atrazine com nicosulfuron. Ciência Rural, v. 53, n. 12, 2023-05-26. (20/07059-4)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

RODRIGUES NETO, Arthur Duarte. Interference of droplet classes and application rates on the performance of the atrazine and nicosulfuron mixture in the management of weed competition in the corn-brachiaria intercropping. 2023. Master's Dissertation - Universidade Estadual Paulista (Unesp). Faculdade de Engenharia. Ilha Solteira Ilha Solteira.