Effect of herbicides and herbicide mixtures on weeds in wheat

A field investigation was carried out to evaluate the effect of herbicides and their mixtures on weeds in wheat (Triticum aestivum L.) cv. PBW-343. Minimum weed density per m² and weed dry weight (5.13 and 17.31g) was recorded with sulfosulfuron at 25g ha⁻¹ followed by clodinofop at 60g + metsulfuron methyl at 4g ha⁻¹ (5.19 and 18.45g), metribuzin at 200g ha⁻¹ (5.85 and 25.98g), pendimethalin at 1 000g fb 2, 4-D at 400g ha⁻¹ (6.49 and 31.73g) and hand weeding twice (7.01 and 35g), respectively. Also, maximum weed control efficiency was recorded under sulfosulfuron at 25g ha⁻¹ (83.85%) followed by clodinofop at 60g + metsulfuron methyl at 4g ha⁻¹ (83.17%) and metribuzin at 200g ha⁻¹ (75.85%), respectively. All the weed control treatments recorded significantly higher harvest index than the weedy check (40.24). Among various herbicidal treatments, application of clodinofop at 60g + metsulfuron methyl at 4g ha⁻¹ recorded highest harvest index (41.91) followed by sulfosulfuron at 25 g ha⁻¹ (41.83) and pendimethalin at 1000g fb 2, 4-D at 400g ha⁻¹ (41.25) respectively. The harvest index recorded under clodinofop at 60g + metsulfuron methyl at 4g ha⁻¹ and sulfosulfuron at 25 g ha⁻¹ was significantly at par with weed free (42.06).