The Effect of Early Control of Weeds Associated with the Maize Crop Using Herbicides

A field experiment was conducted at the Field Crops Research Station in AL-Ghalbiea, Diyala Governorate, Iraq, during the 2022 fall season, in clay soil. This study aimed to determine the best pesticide and the most appropriate concentration to control weeds associated with the maize crop in the field. The results obtained showed that the herbicides atrazine and guradian were suitable control products. When the herbicide atrazine was used at the concentration of 4 L/ha, the number of grains/ear and total yield reached 532.83/ear and 9.90 ton/ha, respectively. Whereas at the concentration of 2 L/ha, the 1000 grains weight reached 260.41 g. The use of guradian herbicide significantly increased the ear length and reached 21.41cm. Best results were obtained when both herbicides were combined in one treatment. Keywords: Maize, guradian, atrazine, herbicides.