EFFECTIVENESS OF HERBICIDES ON THE WEED FLORA OF WINTER CEREALS IN THE REGION OF SÉTIFIAN HIGH PLAINS, ALGERIA

Our experimentation mainly consists of evaluating the effectiveness of the herbicides used(Mustang 360 SE, Zoom WG, Topik 80 EC, Grand star 75 DF, Brumby 80 Ec, Axial 045 EC et Hussar evolution EC) on weed flora and to know the best herbicide that can give good yields. This experimental study was carried out during the agricultural years 2018-2019 and 2019-2020 on the site of the Experimental Station Agricultural of the Technical Institute of Field Crops (SEA-ITGC) of Sétif. This study allows identifying 28 weed species in bread wheat, barley, and durum wheat.The obtained results showed that Calendula arvensis L., Sonchus oleraceus L., Silybum marianum (L.) Gaertn., Ranunculus arvensis L. et Papaver rhoeas L. were among the most important annual dicotyledon weeds in each of the cereals. and Hordeummurinum L., Avena sterilis L., Bromus rigidus Roth., Lolium multiflrum Lamk. and Phalaris paradoxal L. were among the most important monocotyledon species. Herbicide application at the early tillage stage of crops reduced the dry weight of broadleaf weeds by 60% to 90% and of monocot weeds by 55% to 85%. Early chemical weed control of non-irrigated cereals in arid and semi-arid regions is necessary to increase grain and straw yields.