Efficiency of individual application and mixing herbicides on some traits of Bifora testiculata and wheat (Triticum aestivum)

An experiment was conducted to evaluate individual application efficiency and mixing herbicides of broad leaf killer on control of European bishop (Bifora testiculata) as well as traits of growth, yield and components yield of wheat (Triticum aestivum) based on the Randomized Complete Block Design (RCBD) in four replications in research farm of Gonbad Kavous University in 2014-2015 growing season. Treatments included Tribenuron methyl (Granstar), Bromoxynil+MCPA (Bromicide MA ), 2,4, D + Dicamba (Dialen super), mecoprop-p + dichloprop-p + MCPA (Duplesan super), 2,4, D, mixing of the Tribenuron methyl with other herbicides and control (without application of herbicides and hand weeding). Results showed that effect of the various treatments of control (without application of weeds and hand weeding) and herbicides on dry matter, plant desity and total chlorophyll content of Bifora testiculata and whole measured traits of wheat were significant (p<0.01). In the Overall, mixing herbicides had a more decrease effect on the plant desity, dry matter and total chlorophyll content of Bifora testiculata in comparison with individual application. In this study, the hieghest yield were obtained in the treatment of Tribenuron methyl along hand weeding about 3527 and 3720 Kg/h respectively. In return, the lowest yield were found in the treatment of without application of herbicides (1864 Kg/h). The mixing of Tribenuron methyl with mecoprop-p + dichloprop-p + MCPA and 2,4, D + Dicamba caused highest negative effect on Bifora testiculata, while these treatments had a lower negative impact on seed number in spike and seed yield over individual application