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This experiment was conducted to study the effect of different stages of the two spotted spider mite, T. urticae as prey on the biological aspects of the predacous mite, Amblyseius cucumeris at the laboratory conditions, 20 and 30 oC and 75 % R.H. The incubation period of A. cucumeris averaged 3.2 and 3.3 days for the eggs of adult females fed on the adult and immature stages of T. urticae, at 20 oC, respectively. This period did not obviously changed with temperature increase, recorded 2.23 and 2.23 days, at 30 oC., respectively. The mean larval period of female and male of the predator recorded the longest period when the female indivduals fed on immature stages of T. urticae at 20 oC. While the shortest period when the male indivduals fed on the adult stages of T. urticae at 20 oC. The protonymphal period of the phytoseiid mite,durated the longest period 3.37 days when fed on T urticae immature stages at 20 oC, and the shortest period 2.26 days when fed on the adult stage at 30 oC. The longest deutonymphal period lasted 2.82 for male indivduals when fed on the adult stages at 20 oC, but the shortest deutonymphal period 1.4 days when fed on the same prey at 30 oC. Life cycle duarated an average of 10.52 and 12.81 days when female indivduals fed on T. urticae adult and immature stages at 20 oC, when reared at 20 oC, but lasted an average of 8.92 and 10.07 days at 30 oC, respectively. The longest period of the longevity was observed for the female when fed on the adult stage at 20 oC, but the shortest period when the male fed on immature stages at 30 oC.The highest deposited eggs recorded when the female fed on the immature stages at 30 oC, but the lowest number of deposited eggs when female fed on the adult stage of T. urtica.

Biological Studies on the Phytosiid Predator Amblyseius cucumeris (Oudemans) Reared on the Two Spotted Spider Mite Tetranchus urtica Koch