الفهرس 
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Abstract
ABSTRACT
Biology and Release of Coccinella Undecimpunctata For
Aphids Control
Laboratory experiments were carried out to study some
biological aspects of the eleven spotted ladybird beetle,
Coccinella undicempunctata L. (Coleoptera: Coccinellidae)
reared on nymphs of two aphid species (Aphis craccivora Koch.
and Rhopalosiphum padi L.) at 25±2◦C and 65±5% R.H. A.
craccivora proved as a better prey for C.undicempunctata
rearing (shorter immature stage periods; 4.2,12.21,3.35 and 75.8
days for eggs incubation, larval and pupal periods and adult’s
longevity, respectively). The corresponding periods in case of
the rearing on R.padi were 4.72, 11.6, 3.6 and 68.4 days. The
hatchability percentage among deposited eggs were 86.8 and
76.4%, respectively. The preovipositional, ovipositional and
postovipositional periods of the predator were 5.4, 61.1 and 9.3
days when fed on A.craccivora, opposed to 12.4, 49.5 and 6.5
days on R.padi . Total consumption by a C. undecimpunctata
larvae was 235.35 & 283.16 nymphs of A. craccivora, being
higher than 162.05 & 206.20 nymphs of R. padi .
Adults and larvae of C. undecimpunctata