Abstract: The common pistachio psylla, Agonoscena pistaciae Burckhardt and Lauterer （Hemiptera: Psylloidea）, is considered as the most destructive pests of cultivated pistachio trees in Iran. The predatory bug, Anthocoris minki pistaciae Wagner was found as a biocontrol agent for A. pistaciae in pistachio plantation areas of Iran. The influence of temperature on development of this predatory bug was studied at eight constant temperatures ranging from 17.5 to 35℃ and under controlled condition (55%±5% R.H. and 16L∶8D), while rearing on nymphs of A. pistaciae. The results showed that the predator develops successfully within a wide range of temperature 17.5-32℃, however the eggs almost failed to hatch at 35℃ and only 10% of bug’s nymphs reached to adulthood at 35℃ too. The shortest developmental time was obtained at 30℃ from egg to adult emergence. The thermal constants for development of egg, nymph and total development （egg to adult） for this predatory bug were estimated to be 77, 200 and 263 degree-days, respectively. The lower thresholds for egg, nymph and overall development were found to be 8.53, 9.2 and 9.47℃, respectively. These results provide valuable information to develop an integrated pest management program for the common pistachio psylla.

Key words: Agonoscena pistaciae; Anthocoris minki pistaciae, developmental duration, lower developmental threshold, pistachio