Document Type : Research Paper
Abstract
The present study included the effect of different Kinds of corn sorghum and wheat flour on the population density of confuse flour beetle Tribolium confusum Duv. for storage periods 2,4 and 6 months . The results indicated that there were significant differences between flour kinds in the effect on the insect numbers which were from 73.99 insect on sorgum flour to 246.78 insect on mixed of corn and wheat flour as average for three storage period . Insect numbers reached (113.30 , 170.99 and 203.97) insect , weight loss was( 2.99 , 5.69 and 7.88 )gm. and growth rate was (5.66 , 4.28 and 3.42) individual per month for storage periods 2,4 and 6 months respectively . It was found from this study that there were significant and negative correlation between population density and percentage of carbohydrates and oils which its value 0.720 and 0.690 respectively at 5% probability , and there were significant and positive correlation between population density and percentage of protein which its value 0.460 at 5% probability .
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