Efficacy of reducing lintour doses and biocontrol components for an effective weeds control in winter wheat (Triticum aestivum)

Herbicides rate cutting is an example of poor application of chemicals that can have potential adverse implications due to rapid herbicide resistance evolution. Three years studies during 2014 – 2016 have examined the combined effect of reducing new generation herbicide lintour doses 0.18, 0.15 and 0.12 kg/ha-1 and biological components to control weeds in winter wheat (Triticum aestivum L.). Weeds were mainly diminished when herbicide lintour 0.18 kg/ha-1 plus biological agents was applied compared with other treatments. Furthermore, satisfactory reducing of dominant weeds such as Viola arvensis, species of Poaceae and also in some cases, Stelaria media were achieved with below-labeled herbicide dose as 0.15 kg/ha-1 plus biological agents. Hence, the higher efficacy weed control was desirably obtained with the maximum lintour rate combined to biological agents but the difference was not high compared with dose 0.15 kg/ha-1. The lowest herbicide dose 0.12 kg/ha-1 plus biological agents had considerably lower weeds control efficacy on reducing of Viola arvensis, Poaceae and Stelaria media. It was determined that variation of herbicide doses combined with biological agents influenced yield and yield components, the highest yield (7.8 t/ha-1) was obtained with herbicide rate 0.15 kg/ha-1 Plus biological agents. © 2017, National Centre for Agrarian Sciences. All rights reserved.