Abstract
The results of studying the prediation efficiency of the Lady beetles Coccinella novemnotata Herbstand Coccinella undecimpunctata L. (Coleoptera:Coccinellidae) on Hyalopterus pruni Geoffr. (Hemiptera:Aphididae), showed that there is no significant effects between the means of the dialy and total prediation efficiency for the fourth larval stages of the two predators, but the fourth stages showed significant effects when compared with the other stages of the two predators in the means of dialy prediation efficiency which reached 4.85,14.73,37.03 and 63.88 aphid/larvae for the fourth larval stages of C. novemnotata Herbst respectively, in comparison with 4.43,13.63,35.24 and 61.72 aphid/larvae for C. undecimpunctata L. respectively, and for the means of total prediation efficiency for the two predators which reached 13.40,38.60,126.60 and 232.00 aphid/larvae for the fourth larval stages of C. novemnotata Herbst respectively,but it reached 11.20,38.00,115.80 and 222.20 aphid/larvae for C. undecimpunctata L. Respectively. While there is no significant effects between the total means of the dialy and total prediation efficiency for the fourth larval stages of the two predators, which reached 120.49, 408.60 aphid/larvae for C. novemnotata Herbst respectively and 115.02,387.60 aphid/larvae for C. undecimpunctata L. respectively. Also the study showed there is no significant effects between the means of the dialy prediation efficiency during preoviposition and postoviposition period between two predators which reached 164.43,106.52 aphid/pair adults for the C. novemnotata Herbst respectively and 158.13,105.67 aphid/pair adults for the C. undecimpunctata L. Respectively. And there is no significant effects between the means of the total prediation efficiency during preoviposition and postoviposition period between two predators which reached 766.00,463.00 aphid/pair adults for the C. novemnotata Herbst respectively and 684.67,528.33 aphid/pair adults for the C. undecimpunctata L. Respectively. While there is asignificant effects between the means of the dialy and total prediation efficiency during oviposition period between two predators which reached 184.41,5246.33 aphid/pair adults for the C. novemnotata Herbst respectively and 161.96,4052.67 aphid/pair adults for the C. undecimpunctata L. Respectively.
