BIOLOGY AND ECOLOGY STUDIES OF GRAIN SCARAB ( A LEUCASPIS LAPORTE , COLEOPTERA: SCARABAEIDAE)

A. Alshaby, Samer; N. Almaroof, Ismail

doi:10.58928/ku12.03108

	BIOLOGY AND ECOLOGY STUDIES OF GRAIN SCARAB ( A LEUCASPIS LAPORTE , COLEOPTERA: SCARABAEIDAE)
Kirkuk University Journal for Agricultural Sciences (KUJAS)
Article 1, Volume 3, Issue 1, 2012, Pages 67-73 PDF (455.93 K)
Document Type: Research Paper
DOI: 10.58928/ku12.03108
Authors
Samer A. Alshaby; Ismail N. Almaroof
Abstract
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.

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