Résumé:
Weeds and messicoles, also known as weeds, are naturally occurring plants that grow in cultivated fields or gardens. Weeds are adapted to the same soils and climatic conditions as cultivated plants
The objective of our work is to define the messicoles, and carry out a synthesis work between the works published in Algeria and Morocco on messicoles.
In this present work we are interested in making a comparative synthesis between weed studies identifying the method of weed studies in cultivated fields Bibliographic research is carried out on the biology, families and species of messicoles, so that the resulting shows that the families of Poaceae and Asteraceae are the families dominate respectively, the biological types of the species reveal the dominance of therophytes over all biological types, followed by hemicryptophytes and geophytes
The comparative analysis between the four regions shows that the north-western Algerian richest (425 species, 51 families) followed by the Morocco region (324 species 190 genera, 47 families), the region of Hammam Dala (M'sila, Algeria) is represented by 111 species, 27 families), the region of Ouargla (Algerian) contains 75 species of 26 families as fewer species than the other region
