EFFECT OF STARVATION ON THE FREE AMINO-ACIDS POOL IN AN ORGANOPHOSPHORUS-INSECTICIDE-RESISTANT AND A SUSCEPTIBLE STRAIN OF TRIBOLIUM-CASTANEUM

1. Proline constituted 51.5% and 43.5% of the total free amino acids ( FAA) pool in the adult and sixth-instar larvae of the insecticider-esi stant strain CTC 12 of Tribolium castaneum, whereas in the insecticide susceptible strain FSS II of T. castaneum the values are 50.5% and 44 .7%, respectively. 2. Starvation for 6 days resulted in a significant increase in the FAA of sixth-instar larvae of CTC-12, except for tyros ine. In adult beetles aspartic acid (Asp), histidine (His), and lysine (Lys) increased significantly, whereas all other amino acids decrease d. 3. In the FSS-II strain the larvae did not show any drastic respons e to starvation. In the adult beetles, however, Asp, glycine, alanine, His and Lps increased significantly, while several other amino acids were depleted during starvation.