Karaca, I., Uygun, N., Elekcioğlu, N.Z., & Şenal, D. 2002 Population development of Aonidiella aurantii (Maskell) and Parlatoria pergandii Comstock (Homoptera: Diaspididae) in Cukurova Region of Turkey.. Bollettino di Zoologia Agraria e di Bachicoltura (Milano) 33(2001-3): 313-317.
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Notes: [Special Issue: Proceedings of the ISSIS IX International Symposium on Scale Insect Studies held at The University of Padua, Italy, Sept. 2-8, 2001.] This study was carried out in a Citrus (cv. Valencia) orchard in Adana, Turkey, in 1990-95, to investigate the population fluctuations of two scale insects, Aonidiella aurantii and P. pergandii, and their parasitoid Aphytis melinus. Live and parasitized specimens of both species were counted on 50 randomly selected leaves. Sampling was carried out biweekly between May and October and monthly during the remainder of the year. It was found that the population of Aonidiella aurantii was always lower than that of P. pergandii. Average numbers per leaf of P. pergandii and Aonidiella aurantii were 9.91 and 2.68, respectively. Populations of two scale insects and their parasitoid fluctuated together. Under the reducing effect of the parasitoid, population levels of the two scale insects always remained low. The parasitization rate of Aonidiella aurantii was almost always higher than that of P. pergandii, during the study. Average parasitization rate of Aonidiella aurantii was 35.79%, while that of P. pergandii was 27.11%.
