Tunisia, like many countries, human consumption based on the consumption of cereals. Despite the importance of these products, there is the remarkable losses during the medium and long-term storage. Reducing the deficit of these grains lives by reducing losses in quantity, quality before and after harvest. Identification of losses through an experimental study and statistical analysis to know the end, and the time of occurrence of qualitative loss of hard wheat during the period of storage under control and experimental cells. In this local durum wheat storage monitoring study during 06 months. The temperature influences and harmful shriveled grains of around 18% of total quality losses the first two months of storage. While the Moisture affects all that dirt, dust and broken grains sprouted favoring the appearance of live and dead insects from the third month storage represents 64% of total losses.