Higor José Freitas Alves da Silva, Eduardo de Almeida, Felipe Breda Alves, Bruno Andrade Fico, Eduardo Ferreira Molina and Hudson Wallace Pereira de Carvalho*,
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Physical and Chemical Compatibility between Fungicides (Emulsifiable Concentrate and Suspension Concentrate) and Soluble Manganese and Zinc Fertilizers
Foliar nutrition and disease management are key agronomic practices in plant cultivation. Tank mix, combining fertilizers and fungicides into a single application, has gained popularity for streamlining field operations. In this work, the compatibility of fertilizers containing Mn and Zn from sulfate and EDTA sources with fungicides of type suspension concentrate and emulsifiable concentrate in the tank mix was evaluated. The pH and electrical conductivity were monitored in all mixtures. Results showed that 27% Mn, 22% Zn, and 70% active fungicides were found in the precipitate. FTIR and UV–vis analyses did not present bandwidth deviations, indicating complexation. Therefore, adsorption was identified as the primary interaction mechanism rather than complexation. In conclusion, pH and electrical conductivity are key indicators of interactions within the tank mix, and the adsorption interaction between fertilizers and fungicides led to a decrease in the availability of components.
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