Selectivity and efficacy of herbicides applied to soybean for weed control
DOI:
https://doi.org/10.30612/agrarian.v15i55.15715Keywords:
Glycine max, Urochloa plantaginea, Sida rhombifoliaAbstract
Weed control in soybean crop becomes an important practice to avoid grain yield losses. Therefore, aimed to evaluate the selectivity and efficacy of pre-emergent herbicides associated or not with glyphosate applied in post-emergence of the soybean cultivar DM 57i52. The experiment was carried out in a randomized block design, with four replicates. There were tested 15 treatments consisting in use of three doses of each commercial mixture of pre-emergence herbicides imazethapyr+flumioxazin and sulfentrazone+diuron, associated or not with glyphosate, applied post-emergence. In parallel, two controls were conducted, weeded and infested. The formulated mixtures of the herbicides imazethapyr+flumioxazin and sulfentrazone+diuron proved to be selective to soybean. The imazethapyr+flumioxazin mixture showed greater efficiency in the control of alexandergrass and arrowleaf sida. The use of pre-emergence herbicides associated with glyphosate applied in post-emergence favored an increase in soybean grain yield.
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