RESISTANCE OF WEEDS TO HERBICIDES IN THE GHARB REGION OF MOROCCO

A greenhouse trial was done at the National Institute for Agricultural Research Kenitra to evaluate the efficacy of tow herbicides treatments (Cossack and Topick + Printazol), on 7 weeds harvested from several emerged in the fields of the Gharb, The seeds of each weed were sown in plastic pots that were filled with 3.5 kg of soil taken from the Mnasra area of the Gharb, For each species three pots were treated with Mesosulfuron-methyl + Iodosulfuronmethyl (Cossak), In another 3 pots were treated with 2,4-D + MCPA + Clodinafop propargyl (Printazol + Topik), and 2 untreated pots (control), results showed that seedlings from germination of seeds of 7 weeds were sensitive for both treatments (Cossak) and (Printazol + Topick) except for the Lolium rigidium which gave seedlings resistant to Clodinafop propargyl (Topick).