This study was conducted in gardens contaminated with pistachio psylla in Siirt Province between 2007 and 2010. It has been found that pistachio psylla forms the highest populations in the pistachio gardens in the Central District of Siirt Province, and in particular, causes important damages in young leaves in mid-June and in the maturing period of fruits in mid- and late-August. Efficiency in certain counts of yellow sticky trap coded 1016 B, of which efficiency and attraction power are considered significant, was observed in the study. It was concluded in the study that these traps are important for reduction of the population of the pest in cases where the population is small. It was found that traps would provide positive contribution if combined with other methods of fight and used in 4 traps for each tree and 7-day periods of hanging.