Behavior of herbicides mesotrione + S-metolachlor + terbuthylazine applied in association and alone in soil growing corn

• Grant number: 13/25399-3
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: July 01, 2014
• End date: April 30, 2017
• Field of knowledge: Agronomical Sciences - Agronomy - Plant Health
• Agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
• Principal Investigator: Valdemar Luiz Tornisielo
• Grantee: Kassio Ferreira Mendes
• Host Institution: Centro de Energia Nuclear na Agricultura (CENA). Universidade de São Paulo (USP). Piracicaba , SP, Brazil
• Associated scholarship(s): 15/16655-1 - Influence of biochar amendments on the sorption-desorption of mesotrione alone and mixed with the s-metolachlor + terbuthylazine to an agricultural soil, BE.EP.DR

Abstract

Many methods are described for weed control in corn, however, it is observed that in practice the chemical control with the use of herbicides is the most predominant, whether for its enhanced operability, as well as better control efficiency and lower cost. However, it is essential that chemicals be properly applied, that is preserved the final quality of the harvested products, as well as all its natural resources that sustain production, especially land and water. Given the above, the fate of herbicides in the environment is governed by processes of sorption, degradation, and transport of the molecule, such as volatilization, leaching and runoff, in addition to the interactions between these processes. The mesotrione acts on the inhibition of carotenoids, the enzyme HPPD and its sorption is promoted by functionalization of the aliphatic structures in the composition of organic matter. The S-metolachlor is a non-ionizable compound, which belongs to the chemical group chloroacetamides, and shows great variability in residence time in the soil. The Terbuthylazine photosystem II inhibitor, belonging to the chemical group of triazines, has a high potential risk of groundwater contamination. In this context, this project aims to study the behavior of the soil herbicides mesotrione + S-metolachlor + terbuthylazine applied to mixture and isolation. The results serve to introduce differences regarding behavior in the soil of S-metolachlor + mesotrione + terbuthylazine applied together, linking the positive and negative aspects of interaction between these molecules and the understanding of the behavior of molecules applied separately. Although few studies involving the behavior of herbicides on Brazilian soils under tropical climate conditions are also crucial for the efficiency of weed control in corn, because high rates of sorption can compromise the effectiveness of the herbicide. (AU)

Scientific publications

(7)

(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)

MENDES, KASSIO FERREIRA; DOS REIS, MARCELO RODRIGUES; INOUE, MIRIAM HIROKO; PIMPINATO, RODRIGO FLORIANO; TORNISIELO, VALDEMAR LUIZ. Sorption and desorption of mesotrione alone and mixed with S-metolachlor plus terbuthylazine in Brazilian soils. Geoderma, v. 280, p. 22-28, OCT 15 2016. (13/25399-3)

MENDES, KASSIO F.; HALL, KATHLEEN E.; SPOKAS, KURT A.; KOSKINEN, WILLIAM C.; TORNISIELO, VALDEMAR L.. Evaluating Agricultural Management Effects on Alachlor Availability: Tillage, Green Manure, and Biochar. AGRONOMY-BASEL, v. 7, n. 4, DEC 2017. (15/16655-1, 13/25399-3)

MENDES, KASSIO FERREIRA; BARBOSA MARTINS, BIANCA ASSIS; DOS REIS, MARCELO RODRIGUES; PIMPINATO, RODRIGO FLORIANO; TORNISIELO, VALDEMAR LUIZ. Quantification of the fate of mesotrione applied alone or in a herbicide mixture in two Brazilian arable soils. Environmental Science and Pollution Research, v. 24, n. 9, p. 8425-8435, MAR 2017. (13/25399-3)

MENDES, KASSIO FERREIRA; COLLEGARI, STELLA ANDRESSA; PIMPINATO, RODRIGO FLORIANO; TORNISIELO, VALDELMAR LUIZ. Glucose mineralization in soils of contrasting textures under application of S-metolachlor, terbuthylazine, and mesotrione, alone and in a mixture. BRAGANTIA, v. 77, n. 1, p. 8-pg., 2018-01-01. (13/25399-3)

MENDES, KASSIO FERREIRA; COLLEGARI, STELLA ANDRESSA; PIMPINATO, RODRIGO FLORIANO; TORNISIELO, VALDELMAR LUIZ. Glucose mineralization in soils of contrasting textures under application of S-metolachlor, terbuthylazine, and mesotrione, alone and in a mixture. Bragantia, v. 77, n. 1, p. 152-159, JAN-MAR 2018. (13/25399-3)

MENDES, KASSIO F.; DOS REIS, MARCELO R.; SPOKAS, KURT A.; TORNISIELO, VALDEMAR L.. Assessment of Mesotrione Leaching Applied Alone and Mixed in Seven Tropical Soils Columns under Laboratory Conditions. AGRICULTURE-BASEL, v. 8, n. 1, JAN 2018. (13/25399-3)

MENDES, K. F.; MARTINS, B. A. B.; REIS, F. C.; DIAS, A. C. R.; TORNISIELO, V. L.. Metodologias para Estudos de Comportamento de Herbicidas na Planta e no Solo Utilizando Radioisótopos. Planta Daninha, v. 35, 2017. (13/25399-3)

Academic Publications

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

MENDES, Kassio Ferreira. Environmental fate and behavior of mesotrione alone and mixed with S-metolachlor and terbuthylazine in Brazilian soils. 2017. Doctoral Thesis - Universidade de São Paulo (USP). Centro de Energia Nuclear na Agricultura (CENA/STB) Piracicaba.