Efficacy of some sulfonylurea herbicides for weed control of wheat (Triticum aestivum L.) in Sarakhs province

In order to evaluate the performance of sulfonylurea herbicides on weeds control of wheat (Triticum aestivum L. var. Pishgam) in Sarakhs (N.E of Iran), an experiment was performed as randomized complete block design with seven treatments and four replications in 2013. Treatments were: five herbicides of sulfonylurea included as Apyros 75% WG (sulfosulfuron), Atlantis 1.2% OD (mesosulfuron + iodosulfuron + mefenpyre diethyl), Lentour 70% WG (triasulfuron + dicamba), Logran Extra 64% WG (triasulfuron + terbutryn), and Total 75% WG (metsulfuron + sulfosulfuron) in addition two check treatments as weed free and weed infested. Herbicides were applied post emergence at the 4-5 leaf stage of wheat. The results showed significant control of all sulfonylureas on weed as Total 92% (highest) and Logran Extra 50% (lowest) decreased total dry weight of weed compared to the check of weed infested. The corresponding values for Lentour, Atlantis, and Apyros were 74, 71 and 59 percent, respectively. There was no apparent the persistence damage of herbicides on wheat, and all herbicides increased wheat yield compared to the check of weed infested, that was due to its success in weed control.