The coccinellid Hippodamia variegata (Coleoptera: Coccinellidae) is one of the important predators of pistachio psylla. In this study, effect of three pesticides acetamiprid, spirotetramat and sulfur were investigated on the mortality rate of the first and fourth instar larvae, the percentage of survival of adults, the longevity of the developmental period of different stages, and the reproductive and feeding characteristics of H. variegata. Eggs, the first instar and fourth instar larvae and adult females were exposed to different doses of these pesticides. All experiments were carried out under the factorial design in the form of a completely randomized block design. The results showed that different pesticides with different doses used had a negative effect on the development duration of eggs, larvae, pupae and pre-oviposition period, as well as the percentage of egg hatching and emergence of adult insects parameters. In the field dose, the highest reduction in different parameters including fecundity, the egg hatch percentage, the mean daily egg laying of female adults and the percentage of survival rate of adults were observed in acetamiprid. The results of this research showed that Stamipride is not a suitable option for the combined control of common pistachio psyllid along with H. variegata, but the use of alternative pesticides such as spirotetramat and inorganic pesticides such as sulfur with less effect on this ladybug can help farmers to use them optimally. Help in integrated pest control and damage reduction.