The Response of Annual Italian Ryegrass in Saudi Arabia to Some Grass Herbicides

Greenhouse experiments were conducted to study the effect of grass herbicides on selected population of annual Italian ryegrass that survive diclofop-methyl field application in wheat fields in Saudi Arabia. Seeds were collected from Al-Kharj and Al-Qasium area. The survival population of annual Italian ryegrass to diclofop-methyl in Al-Kharj area were found sensitive to Didofop-methyl, Poast, Axiom, and Maverick. While Al-Qasium selection exhibit resistant to double field rate of diclofop-methyl. However, Axiom and Maverick can be recommended as alternative herbicide for controlling this selection in wheat. While Poast can be used to control this population if they emerge in tolerance crops to Poast such broadleaf crops.