Abstract
ABSTRACT The aim of this study was to evaluate the selectivity of ALS inhibitor herbicides, applied isolated and associated with glyphosate in post-emergence of soybean cultivar presenting the RR/STS technologies. The experimental design was a randomized block with four replications and ten treatments. The treatments consisted of the application of glyphosate and ALS inhibitors herbicides, isolated and associated with glyphosate. The application of treatments occurred in V4 stage of plant development. The evaluation of phytointoxication, SPAD index was conducted, as well as variables related to agronomic performance (height, number of pods per plant, yield and mass of a thousand seeds). Yet additional test with the same cultivar and treatment was conducted in a greenhouse in a completely randomized design with four replications. Soybean cultivar CD 2630 RR/STS presented itself tolerant to application in post-emergence herbicides used alone or combined with glyphosate. Except to metsulfuron-methyl (2.4 g a.i. ha-1), associated or not with glyphosate (960 g a.e. ha-1).
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