Effect of new herbicides on growth and yield of wheat

摘要

An average decrease in grain yield by 15.42 % was observed due to season-long weed-crop competition. Lowest monocot and dicot weeds were observed witfi weed free treatment. The best weed control efficiency in case of monocot (90.8%) and dicot (82.8%)was achieved with metsulfuron-methyl and metribuzin, respectively compared to other herbicides namely pendimethaiin, carfentrazone, fenoxaprop and 2,4-D. Ail the treatments except fenoxaprop, carfentrazone, 2,4-D and mixture of metribuzin and fenoxapropapplication gave significantly higher grain yield compared to weedy check. However , higher additional net return ( 31,359) was obtained with metsulfuron-methyl followed by metribuzin (30,907).