The cultivation of wheat is a relatively new agricultural endeavor in the Algerian Saharan. The Algerian government has recently prioritized this initiative as part of its broader strategy to enhance food security and reduce dependence on cereal imports. However, this new speculation, grown under a pivot, is often impacted by various environmental (extreme temperatures, aridity, low soil fertility) and biological factors(pests). One of the key contributors to cereal losses in this region is the harvester ant species Messor foreli (Santschi, 1923).The estimate of overall losses, especially the impact of M. foreli on cereal crops, concerned four pivots spread over two stations in Ouargla region (southeast of Algeria). This study proved that M. foreli ant nests could occupy about 0.009% of the total cultivated area, to be 139 to 519 ant nests in each pivot. However, the rate of production overall losses has been estimated between 8.66% and 17.65% with M. foreli’s contribution that has fluctuated between 1.93 and 2.43 qx/pivot from a whole mean potential production that ranged between 260 g/m2 on Triticum aestivum and 408.01 g/m2 on T. durum. Outputs showed a negligible M. foreli effect compared to other weight losses, which ranged from 75.98 to 163.47 qx/pivot