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Distribution of Population of Immature Stages of Pear Psylla, Cαcopsyllα pyri, within the Tree and Development of Sampling Strategy

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E. T. Stratopoulou, E. T. Kapatos
E. T. Stratopoulou, E. T. Kapatos


The distribution of Cacopsylla pyri (L.) (Homoptera-Psyllidae) infestation within the tree canopy and in the varions organs of the tree was investigated in the region of Magnesia (Greece) during 1988 and 1989. The upper parts of the tree canopy and the sections ori­entated to South and west were infested heavier during winter and spring. Later in the scason the infestation was diffused within the tree canopy and at the end of the season a rather uniform pattern of distribution was observed. During the first oviposition period (February-March), the preferred oviposition sites were flower buds white during spring (second generation) they were the leaves of flower buds and young shoots. Sampling strategy for the study of populations of immature stages of pear psylla is discussed on the oasis of these findings.


Cacopsylla pyri; Distribution of Cacopsylla pyri; Sampling of Cacopsylla pyri

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Atger. P. 1979. Les psylles du poirier. Biologie et contrôle en verger. Phytoma. 31:19-22.

Bonnemaison. L. 1962. Les Ennemis Animaux des Planles Cultivées et des Forets. Vol. Ill Paris. 413 pp.

Bonnemaison, L. el J. Missonier 1956. Le psylle du poirier (Psylla pyri L.). Morphologie et Biologie. Méthodes de iutte. Ânnls F.piphyt. 7:263-331.

Broumas, T.. C. Souliotis. I). Zdoucopoulos and A. Tsourgiani 1989. Study of the dynamics of populations of pear-tree psylla and control experiments. Proc. 3rd Nat. Ent. Cong.. Thessaloniki (Greece). 1989.

Cochran, W.G. 1963. Sampling Techniques. John Wiley and Sons. Inc. New York.

Hodkinson. I.D. 1984. The taxonomy, distribution and host plant range of the pear feeding psyllids (Homoptera: Psylloides). Bull. OII.B SROP, 7:32-44.

Nguyen. T.X. 1962. Cycle biologique d'un Psylle du poirier (Psylla pyri L.) (Homoptera: Psyllidae) dans le midi de la France. Bull. Soc. Histoire Nat. Toulouse. 97:233-240.

Le Roux. E.J. and C. Reimer 1959. Variations between samples of immature stages and of mortalities from some factors, of the Eye-spotted Bud Moth. Spilonola ocellana (D. & S.) (Lepidoptera: Olethreutidae), and the Pistol Case bearer. Coleopiera serratala (L.) (Lepidoptera: Colcophoridae). on apple in Quebec. Can. Ent. 91:428-449.

Onillon. J.C. and J.P. Bassino 1976. Premieres observations et orientations des récherches dans le déterminisme des sites préférentiels de ponte du psylle du poirier (Psyllapyri L.) (in abstract). Rev. appi. Eni. 1976.

Sokal. RR. and l'.J. Rohlf 1969. Biometry. W.U. Freeman. San Francisco. 776 pp.

Southwood. T.R.E. 1978. Ecological Methods with Particular References io the Study of Insect Populations. Chapman. London. 2nd ed. 524 pp.


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