EN
Granary weevils feed on wheat grain causing huge losses of stored material. Experiment was carried out on wheat grain Korweta variety. Weighted on analytical balance 50 kernels were infested by 5 pairs of granary weevil adults. The insects were feeding 1, 2, 3, 5, 10, 20 and 30 days and after that were removed and kernels were weighted once again. Then the grains were grounded and proteins extracted with 0.1 M acetic buffer pH = 5. Protein content was determined by Bradford method. All each time of infestation samples were repeated five times. It was found that the grain weevil beetles feeding on the wheat grain, at least five days caused statistically significant losses in grain weight and extractable protein content.