Abstract
Result of studing the effect of three varieties of Wheat Eba 95 , Eba 99 , Sham 6 and three storage periods 2 , 4 , 6 months and three infection levels 10 , 20 , 30 larva of Khapra beetle showed variation varieties for susceptibility to Khapra beetle , the higher average of population density reached 430.9 larva for Eba 95 , the lowest average reached 209.9 larva for Sham 6 , the storage period showed a significant effect to the average of larva. for the varieties reached 31.2 , 541.9 , 326.3 larva respectively , there is positive relation between the increase of population density and infection levels reached 244.9 , 264.9 , 389.6 larva respectively. The study showed variation at the varieties for the insect average rate of increase it were 13.7 , 22.5 , 12.7 larva respectively , the storage period showed significant effect for insect average rate of increase it reached at 4 months storage period 28.3 larva , the infection levels showed variation for insect average rate of increase at level 10 larva it reached 23.5 larva , the influence of variety for the loss of food weight , Sham 6 showed a higher resistant for larva that the other varieties it reached 9.5 , 11.9 , 12.9 gm respectively. Increasing the period of storage increase the loss of food weight it reached 1.98 , 15.48 , 16.99 gm respectively the highest loss of food weight reached 14.4 gm at the level so larva. The Sham 6 variety showed higher resistant for average loss of food weight per larva , the storage period showed variation at average loss of food weight per larva it reached 13 , 4 , 7 gm respectively. the infection level have no significant effect on loss on food weight per larva it reached 7 , 8 , 9 gm respectively.
