Effects of vanillin and gamma irradiation on the development of confused flour beetle, tribolium confusum (DUV.)

The effect of the natural chemical compound food flavoring agent, vanillin on the tribolium confusum was examined. The effect of vanillin on tribolium confusum reared as 18-day old larvae decreased the percent adult emergence, it was 32 % and 51.4 % adults at the treatments 2 % and 4 % respectively. The sex ratio was in favour of female at control group (1:1.2 male:female). This ratio reversed at the treatments 2 %, 4 % vanillin was favour of males. When one day old larvae treated with 2 %, 8 % vanillin, the percent pupation was decrease from control group. It was 31.83, 45.0 %, as compared with 53.33 in control group, respectively. At highest treatment 8 %, sex ratio was in favour of males. The mean number of total progenies decrease significantly from control when larvae 18-day old treated with vanillin and stored for two or four months. While when larvae 1-day old treated with vanillin , the decrease in the number of total progenies was insignificant. When one day old adults irradiated at 20, 50 and 70 Gy and reared for two and four months. The mean number of progenies decrease significantly by increasing the radiation dose, when compared with control group