Effect of integrated weed management in kharif grain sorghum [Sorghum bicolor (L.) Moench]

Field experiment was conducted during kharif season 2023 at Agricultural Research Station, Hagari, Karnataka, India to study the effect of integrated weed management in kharif grain sorghum. The experiment comprised of eleven treatments allotted in randomized complete block design in which eight treatments with herbicides, two treatments based on hand weeding and inter cultivation and one weedy check, each replicated thrice. The weed free check treatment (T10) as recorded significantly higher growth characteristics like plant height, number of leaves plant-1, leaf area, dry matter production plant-1 and yield attributes like length of earhead, number of grains earhead-1, grain weight plant-1 and test weight. Whereas, T10 was found on par with treatments atrazine 50% WP @ 500 g a.i. ha-1 as PE fb metribuzin 70% WP @ 100 g a.i. ha-1 as PoE at 15-18 DAS (T7) and atrazine 50% WP @ 500 g a.i. ha-1 as PE fb 2,4-D Na Salt 80% WP @ 750 g a.i. ha-1 as PoE at 25 DAS (T4). Significantly higher grain and stover yield (3049 and 8880 kg ha-1, respectively) was registered in T10, but it was on par with T7 (2905 and 8576 kg ha-1, respectively) and T4 (2809 and 8395 kg ha-1, respectively). Further, significantly lower growth parameter, yield attributes and yield were noticed in weedy check (T11).