Recent developments in weed control research in wheat
V.N. SaraswatA and J.S. Mishra, All India Co-ordinated Research Programme on Weed Control, National Research Centre for Weed Science, Maharajpur, Jabalpur 482 004, (M.P.), India.
A Present address: Project Co-ordinator, AICRP-Jute and Allied Fibres, CRI for Jute and Allied Fibres, 24 Parganas (N), Pin-743101, Barrackpore (W.B.), India.
Summary
The majority of literature on weed control in wheat (Triticum aestivum) concerns site-specific evaluation studies of weeds and their control. Control methods range from a combination of cultural and chemical practices to mostly chemical methods. Continuous use of a single control method leads to shifts in weed flora and build up of tolerant species, emphasising the importance of integrated weed control systems. Herbicide mixtures give broad spectrum weed control. There are scarcely more than a dozen species of weeds of overall importance to wheat and grassy weeds pose more of a problem than broad leaved weeds. Weed competition studies quantify factors in terms of critical threshold or duration of competition. Different wheat cultivars vary in response to herbicides. Most of the herbicides used in wheat do not have residual properties and in wheat based inter-cropping systems, pendimethalin and isoproturon meet the basic requirements.
Plant Protection Quarterly (1996) 11 (3) 114-121.