Optimum weed management of weeds in wheat fields of Iraný

In order to investigate the antagonistic and synergistic effects and the possibility of tank-mixture of some important broadleaf herbicides and micronutrients fertilizers in wheat fields an experiment was conducted in randomized complete block design with two-factors during 2009-2010 in Khorassan Razavi Province ,Jolgeh - Rokh with four replications. The first factor consisted of three levels of herbicides including 2,4-D+MCPA at 1.5 lit.ha-1, Bromoxynil+MCPA at 1.5 lit.ha-1 and tribenoron-methyl at 20 gr.ha-1 as commercial ingredient. The second factor consisted of seven levels of micronutrients including complete fertilizer 'Liberl-BMX' containing micronutrients chelate of iron, zinc, manganese, copper, boron and Molybdenum at 1.5 kg.ha-1, complete fertilizer 'Biomin 235' containing chelate of iron, Molybdenum, nitrogen, zinc, copper and manganese as two lit.ha-1, complete fertilizer 'Biomin 466-sp' containing iron, Molybdenum, nitrogen, zinc, copper, magnesium, cobalt and manganese at one kg.ha-1, chelate of iron 'Liberl Fe' at one kg.ha-1, chelate of Manganese 'Liberl Mn' at one kg.ha-1 and of chelate of zinc 'Liberl Zn' at one kg.ha-1. The fertilizers and herbicides were sprayed in tank-mixture in tilleing stage of wheat. The results showed, the efficacy of Bromoxynil+MCPA and 2,4-D+MCPA to control broadleaf weeds was partially better than tribenoroun-methyl. Applied fertilizers caused no damage on efficacy of the three herbicides. Therefore, tank mixture of fertilizers and herbicides used in the present study is possible. In addition, the tank-mixture of these fertilizers and herbicides had no deleterious effects on wheat and its grain and biological yields. Fertilizes containing Zn were the best treatment compared to others. Key Words: Tribenoroun-methyl, 2,4-D+MCPA, Bromoxynil+MCPA, iron, zinc :