Abstract
The present study included the effect of local rice varieties Anbar , Aqqrawi , Baziani and imported varieties American , Vietnami , Thailandi and the effect of storage period 2 ,4 Months with the effect of levels infestation 10 ,20 ,30 insect on the population density and growth rate of saw toothed grian beetle and loss weight in seeds . the results showed that the average of population density increased with increasing storage period from 48.96 to 73.29 insects , Aqrawi variety had a high population 110.55 insect and American variety had a low population 33.80 insect . The average of population density increased too with increasing level infestation from 47.97 to 62.70 to 72.72 insect , respectively , and the general average of growth rate reached 1.36 and 1.08 for storage periods , respectively , and 1.66 ,1.09 and 0.84 for level infestation , respectively . According to loss weight , the general rate 0.29 and 0.38 gm.for storage poriod , respectively ,and 0.22 ,0.34 and 0.45gm.for level infestation , respectively
