Survey of effect herbicides application post emergency and Weeding on agronomical characteristics corn and weeds control in Zea mays

Survey effects of new herbicides on control of weed and ear characteristics of maize, an experimental was carried out as complete randomized block design with three replications in the research station of Islamic Azad University- Arak Branch, Iran in 2012. Three different herbicides were applied after maize emergence, namely Nicosolfuron, Rimsolfuron and (Rimsolfuron +Nicosolfuron) With treatment weeding in compared to twice Weeding and Weedy check treatment in the maize variety Sc-704. Results showed that application of Rimsolfuron +Nicosolfuronat+ Weeding decreased weeds dry weight as compared to Weedy check treatment by 88.96%. Application of Nicosolfuron at rate of 2 liter per ha-1 decrease weeds dry weight as compared to Weedy check treatment by 37.22% that between herbicide treatments had least effects. The maximum of grain yield equal 4514 kg/ ha was obtained from Rimsolfuron +Nicosolfuronat + Weeding.