1Chief Technical Officer, ASRB, KAB-1, Pusa, New Delhi, 110 012
2Head, ICAR-RCER Research Centre for Makhana, Darbhanga, Bihar, 800 014
3Former Head and Dean, Raja Balwant Singh College, Bichpuri, Agra, Uttar Pradesh, 283 105
4Senior Scientist, (Agronomy), ICAR-Research Complex for NEH Region, Sikkim Centre, Tadong, Gangtok, 737 135
Raja Balwant Singh College, Bichpuri, Agra, Uttar Pradesh, 283 105
*Corresponding authors Email: raghavenupc@gmail.com
Online published on 8 September, 2016.
A field experiment was carried out during 2 winter (rabi) seasons of 2008–09 and 2009–10 at New Delhi, to evaluate the efficacy of different herbicides on weed population, productivity and nutrients acquisition of wheat [Triticum aestivum (L.) emend. Fiori & Paol.]. Among the herbicidal treatments, ready-mix applications of mesosulfuron + iodosulfuron (24 + 4.8 g/ha) recorded the lowest weed density and NPK removal by weeds. How ever, this treatment remained statistically at par with mesosulfuron + iodosulfuron (18 + 3.6 g/ha), sulfosulfuron + metsulfuron (20 + 4 g/ha) and clodinafop + metsulfuron (60 + 4 g/ha). Application of sulfosulfuron and metsulfuron (20 + 4 g/ha) recorded the maximum values of plant height (89.81 cm at harvesting), number of tillers/m (93.39 at harvest), dry-matter accumulation, grain yield (5.23 t/ha) and nutrients uptake (142.4 kg N, 18.90 kg P and 117.23 kg K/ha), which was closely followed by weed-free, mesosulfuron + iodosulfuron (24 + 4.8 g/ha), (18 + 3.6 g/ha) and tank-mix clodinafop + metsulfuron (60 + 4 g/ha).
Herbicide efficacy, Herbicide mixture, Nutrients removal, Weed-management
