Efficacy of Herbicidal Combinations Tank Mixed with Zinc and Iron Sulphate against Weeds in Wheat (Triticum aestivum)

Weeds are affecting wheat production significantly and now days, micronutrients deficiency is also being observed in wheat growing areas. Field experiment was conducted at RRS, Bawal during Rabiseason of 2018–19 to evaluate the efficacy of post-emergence herbicidal combinations with Zn or/and Fe against complex weed flora in wheat. Experiment consisted of 18 treatments. Four herbicidal combinations viz. clodinafop + metsulfuron@ 60 g ha⁻¹, sulfosulfuron + metsulfuron @ 32 g ha⁻¹, mesosulfuron + iodosulfuron @ 14.4 g ha⁻¹, pinoxaden + carfentrazone @ (50 + 20 g ha⁻¹) were evaluated for efficacy with Zn, Fe and with both Zn as well as Fe. Satisfactory weed control was observed with all the treatments of herbicidal combinations. Among sole herbicidal combinations, application of mesosulfuron + iodosulfuron (14.4 g ha⁻¹) resulted lowest population and dry weight of grassy weeds whereas application of pinoxaden + carfentrazone (50 + 20 g ha⁻¹) was mosteffective against broad leaved weeds. Tank mixing of Fe improved the efficacy of herbicidal combinations. Efficacy of herbicidal combinations was further increased when Zn was tank mixed with herbicidal combinations. Highest weed control efficiency was recorded when herbicidal combinations were applied as tank mixed with both, Zn and Fe sulphate.