Euphyllura phillyreae Foerster (Hemiptera: Psyllidae) (Zeytin pamuklubiti)’nin İzmir ilinde popülasyon değişimi ve bazı biyolojik özellikleri.

The occurrence of biological stages and population fluctuation of Euphyllura phillyreae Foerster (Hem.: Psyllidae) on Memecik olive trees (Olea europaea L. cv. Memecik) in Bornova and Kemalpaşa districts (İzmir) were investigated during the years of 2015-2016. The eggs of E. phillyreae in olive groves were found between 8 March-12 May and its nymphs between 16 March and 18 June. The first eggs laid during the formation period of flower clusters and at the beginning of budding period in Bornova were seen 2-3 weeks before Kemalpaşa. Egg and nymph stages were only appeared between early March till middle of June. The average temperatures of March, April and May respectively were: 11.9/14.9/22.6 °C in Bornova, 9.6/12.6/20.2 °C in Kemalpaşa in 2015; and it was 13.4/18.2/21.2 °C in Bornova, 11.0/16.9/18.4 °C in Kemalpaşa in 2016. The number of nymphs reached highest level in the last week of April. Also, in both years, nymphs were seen in Bornova until the third week of June (medium-large green fruit period) and until the end of May (fruit set period) in Kemalpaşa. Adults were collected from olive groves throughout the year. Although it changes over the years, new adults firstly emerged during the closed flower bud, flower bud opening, beginning of flowering or 50% flowering periods of olive trees between 28 April and 29 May. It was determined that the adult population was higher during the summer months and then gradually decreased. The lowest adult numbers were obtained in January and February. It was concluded that E. phillyreae was univoltine in Izmir. [ABSTRACT FROM AUTHOR]