The life cycle of A leucaspis Laporte which attack poplar species was studied in Iraq in 2,,2 . The study showed that the mean of incubation period , viability and larval stages (2 days , ,,8 , ,49 days) respectively . it was appeared that the larval stages live inside the ground .
After the emergence of adult it laid the eggs on soil . The study also indicated that the number of eggs laid by a single female were 2,-2,, egg . Also it was found that this species of insect has one generation per year . The hibernation appeared in the second larval instar . Ecological study has shown that the area and percentage of damage started with primary appearance of the grains scarab
adult at the beginning of may . The increasing of insect number caused an increase in the area and percentage of damage which reached their maximum means ( 5,.4, , 51.66 and 6.,6 cm2 ) , (54.25 ,
5,.,4 and ,.6,8 ) respectively for populus deltoides , p. nigra and p. euphratica respectively , this
happened when the insects number means reached the maximum 22.1, , 5,.25 and 51.51 insect /leaves for the above mentioned poplar species to mean temperature for ,,c◦ and R.H 21 % .
The statistical analysis showed that there is a significant correlation between the mean insect number and mean of area and percentage of damage in the , poplar species with ( r ) value ( ,.,2 , ,.,, and
,.,, ) for damage area , and for damage percentage ( ,.6, , ,.,6 and ,.65 ) respectively.