Figure 1

The frequencies of plant mortality (%) in response to glyphosate grouped into two clusters for 314 individuals of Conyza bonariensis (ERIBO) or C. sumatrensis (ERISU) sampled in 20 soybean fields across four cropping macroregions in 2021 in Brazil. The data were evaluated 42 days after treatment. Dashed lines correspond to the cluster limits. K-clustering was defined by the elbow criterion, and the limits among clusters were defined by the K-means method.