02174nas a2200133   4500008004100000245013100041210006900172300001100241490000800252520160200260100002501862700002001887856013301907       1995                        eng d00aThe dynamics of the adult population of pear psylla, Cacopsylla pyri L.  (Hom., Psyllidae) in the region of Magnesia (Greece).0 adynamics of the adult population of pear psylla Cacopsylla pyri   a97-1010 v1193 aDuring the years 1991/92, the dynamics of the adult population of Cacopsylla  pyri L. was studied in Greece (region of Magnesia). At  regular intervals during the year, estimates were obtained of the size of the  population of males and females, percentage gravid females, sex ratio, number  of eggs per gravid female and daily rate of oviposition. The adult population  of pear psylla was sampled in such a way that estimates can be directly  related quantitatively with simultaneous estimates of the immature stages.  During most of the year females were more abundant than males except during  the period of high adult emergence and the period of diapause when sex ratio  remained close to 1:1. During the infestation period (February-October) a  large proportion of the females contained mature eggs except during the  period of high emergence of new females when, briefly, the proportion of  mature females in the total female population was low. The mean number of  mature eggs per gravid female changed considerably during the same period  (February-October). It was very high during late winter, spring and autumn  and low during summer suggesting that ovarian development is depressed during  summer, which may be due to high temperatures. Consequently, the daily rate  of oviposition was high during spring and autumn and low during summer.  During late winter (February-March) the daily rate of oviposition was low,  although the females contained a high number of mature eggs suggesting that  ovarian development and rate of oviposition are not equally affected by  weather conditions.1 aStratopoulou, E., T.1 aKapatos, E., T.  uhttps://icgf.myspecies.info/content/dynamics-adult-population-pear-psylla-cacopsylla-pyri-l-hom-psyllidae-region-magnesia-greece