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A survey and weed sampling was carried in barley fields to determine know local knowledge effect on weeds management and intensity, diversity under different regions, i.e, sedi-Khaled, AL-Abrouq, Safsaf, Shahaat, Ras-Traab, Garnaada, EL-Faidya, EL-Baida, El-Wesita, Omar Al-Mokhtar and El- Maraje. Survey and field work was carried out more specially at march 2018-2019, (heading stage), both qualitative and quantitative data were collected. Six weed species were more occupied the regions land. They were : bromus rubens; lolium rigidum L., Brassica tournfortii, Gouan; silybum, marianum L., viciamonatha, Retz and medicago polymorpha L. Results exhibited that B.rubens was the superiority in the density; frequency, meanwhile L.rigidum recorded the importante value. Ras –traab region showed the significant increase in density, dominance concluded value, while El-Baida for importance value. This study concluded that these indecies were more benefit to study the return from weeds control. [ABSTRACT FROM AUTHOR]