Abstract
The objective of this study was to evaluate the use of diquat, glufosinate ammonium, saflufenacil and flumioxazim, positioned alone and/or combined, in the pre-harvest desiccation of soybean crops. For this purpose, a field experiment was conducted, with application of the treatments in the phenological stage R 7.2 of soybean. At 3 DAA, the herbicides diquat and their combinations with flumioxazin and ammonium glufosinate, at all doses, resulted in defoliation and desiccation percentages greater than 90%. At 5 DAA, only the flumioxazin and glufosinate ammonium treatments, alone, did not show indices for harvesting. At 10 DAA, only the control differed from the other treatments in relation to desiccation, demonstrating the need to apply desiccants to enable harvest. The results indicate that the combination of herbicides may represent an alternative to reduce doses and increase the efficacy of isolated products through synergism, in addition to operational gains.
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