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Occurrence of immature stages of olive psyllid Euphyllura phillyreae (Hom., Aphalaridae) in Phillyrea latifolia and Olea europaea in coastal northern Greece
Author(s) -
ProphetouAthanasiadou D. A.
Publication year - 1997
Publication title -
journal of applied entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.795
H-Index - 60
eISSN - 1439-0418
pISSN - 0931-2048
DOI - 10.1111/j.1439-0418.1997.tb01423.x
Subject(s) - olea , biology , phenology , olive trees , mediterranean climate , quercus suber , botany , host (biology) , ecology
The occurence of immature stages of olive psylla, Euphyllura phillyreae Foerster on olive trees ( Olea europea ) and Phillyrea media in northern Greece was studied during the years 1989/90. E. phillyreae , which infests olive trees and Phillyrea latifolia (P. media) in Greece, is univoltine and has an aestival–autumnal–hibernal reproductive diapause as an adult. Immature stages and adults were collected from January 1989 through December 1990 from two groups of P. latifolia , differing in vigour and time of blooming, and from olive trees. On olive, the first eggs were observed on early April. On Phillyrea , eggs were deposited much earlier than on olive. Egg laying was related to host phenology. As the eggs were laid during certain growth stages of the host plant, the various larval instars were also synchronized with certain growth stages of the plant. Therefore, the oviposition and the occurrence of larval stages differ between the three host plants tested and coincide with the proper stage of growth of each plant group. The period from oviposition to adult emergence was longest (3 months) on Phillyrea 1, shorter (2 months) on Phillyrea 2 and shortest (1.5 months) on olives.