Separate and combined application of herbicide in bean weeds control and its yield

Abstract

Prevalent presence of weeds in bean fields means that it is necessary that new herbicide adopt for weed control in this crop. In order to evaluate the effects of gallant (hexafop methyl) Treflan (trifluralin) bentazone herbicides on bean and its weeds an experiment was conducted in 2013 using Randomized Complete Blocks Design with three replications. Seven herbicide treatments included: 1) gallant, 2) treflan, 3)bentazone, 4) gallant + treflan, 5) gallant+ bentazone, 6) bentazone+ treflan, 8) gallant+ treflan+ bentazone and 9) weedy check were used in the experiment. The results showed that combined application of herbicides had a better effect on weed control compared to separate application of each of them. Combined application of three herbicides significantly increased pod number (12.14 pod per plant) and seeds per pod (6 seeds) the lowest weeds density and dry weight also obtained in treatment of gallant+ treflan+ bentazone. In conclusion the results showed that the use of combined application had better performance in bean weed control and can be recommended as an alternate application instead of separate application of herbicides in similar conditions.