Department of Agronomy, Janta Vedic College, Baraut, Uttar Pradesh 250 611.
*Corresponding author. (E-mail: nishaknl@gmail.com)
†Present address: Indian Agricultural Research Institute, Regional Station, Karnal, Haryana 132 001.
A field experiment was conducted at Baraut in Uttar Pradesh during 2001–02 and 2002–03 to study the effect of different herbicides as sole and their tank mixtures on wheat (Triticum aestivum L. emend. Fiori & Paol.). The highest grain yield of 4.49 t/ha was recorded with fenoxaprop-p-ethyl + carfentrazone (100 + 10 g/ha) applied 30 days after sowing, which was at par with weed-free treatment. The lowest dry weight of weeds (22.0 g/m2) and highest weed-control efficiency (84.7%) were observed with fenoxaprop-p-ethyl + carfentrazone due to control of grassy and broad-leaf weeds. Although the tank mixture of isoproturon + carfentrazone showed greater control of broad-leaf weeds, it gave significantly lower control of grassy weed (Phalaris minor) compared with fenoxaprop-p-ethyl + carfentrazone. Metsulfuron alone at 4 and 8 g/ha was found superior to 2,4-D and carfentrazone 10 g/ha for dry weight of weeds and weed-control efficiency. There was reduction of 25.7% in seed yield under weedy check conditions. None of herbicide alone or in mixture showed residual effect on succeeding crops of fodder maize and mungbean.
Bio-efficacy, Economics, Herbicide, Residual effect, Tank mixture, Weed density, Yield
