The researchers tested different herbicides on gladiolus plants to see which ones worked best for controlling weeds. They tried eight herbicides and compared them to a control group with no weed treatment. The best results were seen with pendimethalin at two different concentrations, which led to better plant growth and flowering. Pendimethalin at 0.75 kg/ha was particularly effective at reducing weed density and weight. Atrazine and metribuzin also showed some effectiveness, but the unweeded control group had the most weeds and lowest plant growth.