Weed interference or control duration on the yield and quality of common bean sown at two densities

Tejada J.L.; Lemos L.B.; Joaquim C.Z., Júnior; da Costa Aguiar Alves P.L. · Ciencia Rural (2026) · DOI: 10.1590/0103-8478cr20250176

Resumen

The common bean (Phaseolus vulgaris) is crucial for food security, but its yield and grain quality may be significantly affected by weed interference. This study analyzed the effects of weed interference and control on common bean yield and grain quality under two planting densities. Two experiments, one with 15 and the other with 10 bean plants m-1, were conducted using randomized block designs and a 7 x 2 factorial arrangement, consisting of seven weed interference or control periods (10, 20, 30, 40, 50, 60, and 80 days after bean emergence) and two management regimes (weed interference or control), with four replicates. Variables related to grain yield and quality were analyzed. Prolonged weed interference reduced bean yield by 71% and 68% at densities of 15 and 10 plants m-1, respectively, decreased the number of large grains, and increased the amount of impurities and smaller grains, effects that were more pronounced at the higher density. Weed control increased 100-grain weight and grain percentage per pod at 10 plants m-1. Controlling weeds for up to 30 days after crop emergence reduced grain cooking time at 10 plants m-1. Weed interference negatively affected both yield and certain grain quality traits, with the greatest losses observed at 15 plants m-1. By contrast, weed control improved some yield components and improved grain cooking time at 10 plants m-1.

Instituciones: Universidad Nacional Agraria La Molina