Abstarct: Flour moth Anagasta kuehniella (Lep: pyralidae) is one of the stored product pest which causes huge damages to storage products and dried fruit quantitatively and qualitatively. In the present study, the death effect and sublethal of theses mixtures Palizin, diflubenzuron, Chlorpyrifos, deltamethrin and hexaflumuron on Third instar larvae of flour moth are examined. Larva flour moth were grown under the experiment conditions: temperature 25±3, humidity 40±5 percent and light period 14:10 hours. In order to calculate food indices parameters, the Hung et al. (1998) method treatment flourthe discs the experiments were done. baxsed on the minimal and maximum average values of LC50 are 76.14 and 208.55, respectively which are affected by Deltamethrin and Palizin. The maximum and minimum larva period are 19.75±0.25 and 14±0.4 days related to Deltamethrin and Palizin. poision. The maximum and minimum period are 9.75±0.25 and 7.75±0.25 days and theses values relating to pupa weight are 0/012±0/0004 and 0/016±0/0004 gram respectively. The minimum and maximum amounts of breeding are 237±2.27 and 247.75±1.25 and the maximum and minimum amounts of eggs hatching percent are 61±0.81 and 73.75±0.47. Finally, the minimum and maximum percent of perfect insects exit are 27.5±2.5 and 42.5±2.5 respectively and reletad to Deltamethrin and Palizin mixtures. By considering the results of food indices, by enhancing the mentioned mixtures concentration, the relative growth rate, the relative usage rate and the efficiency index of transforming swallowed food was decreased and Deterrence nutrition index was increased. Deltamethrin at concentration of 200 ppm had the maximum effect on relative food usage rate and decreased it to the least value of 0.045±0.001 gram.