TY - JOUR AU - Cevdet KAPLAN, AU - Mustafa Cemal ÇİFTÇİ, PY - 2020/06/01 Y2 - 2024/03/29 TI - Determination of The Distribution and Population Dynamics of Pistachio Psylla [Agonoscena pistaciae Burck. and Laut. (Hemiptera: Aphalaridae)].' ın Siirt, Turkey JF - ISPEC Journal of Agricultural Sciences JA - ISPECJAS VL - 4 IS - 2 SE - Articles DO - 10.46291/ISPECJASvol4iss2pp51-65 UR - https://www.ispecjournal.com/index.php/ispecjas/article/view/40 SP - 186-200 AB - <p>This study was carried out in 2015-2017 with the aim of determining the distribution and population dynamics of Pistachio psylla [<em>Agonoscena pistaciae </em>Burck. and Laut.) (Hemiptera: Aphalaridae)] in Siirt province. In order to determine the distribution area, observation and examination were conducted in 66 pistachio orchards in 24 villages in Central, Aydınlar, Eruh, Kurtalan, Pervari, and Şirvan districts of Siirt. In order to determine the population dynamics of the pest, observation and examination were conducted in 4 pistachio orchards in Central district of Siirt. Beating and visual inspection method were used to determine the distribution area and visual inspection method was used to determine the density of nimf and egg stage of <em>A. pistaciae</em>. The sampling was done at 1-2 week intervals. As a result of the study, <em>A. pistaciae</em> was found to be distributed in all districts and all of the controlled orchards were infected. Wintered adults are determined in the middle of April the first eggs in the last week of April and the first nymph in late April-early May. The adults pass through winter were seen in middle of September.&nbsp; It was found that the population density of the nymph and egg of <em>A. pistaciae</em> increased slightly in late May and early June but its nymph, egg and adult population density was high from late August to mind November. That time it exceeded the economic loss threshold in many orchards. In the checks to be made in late May-early June and last july mid –August, one or two chemical applications will be sufficient if 20-30 nymphs are detected per compound leaf.</p> ER -