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Laboratoire d’Ecologie des Vertébrés Ecole Nationale Supérieure Agronomique 16200 El-Harrach Alger Email : m.biche@ensa.dz ABSTRACT The biology of P.oleae was studied over 2 years in an olive yard situated in the region of CapDjenet (36°E and 3°7N). It was found that the armoured scale has a cycle of two generations per year. Most often, it is the breeding females that overwinter rather than young females. Fecundity is affected by the tree phenology as well as some of the environmental factors. Increasing temperatures and thrust sap of spring, for instance, affects the time that females spend in laying eggs. It was also shown that high temperatures comprised between 30°C and 35°C affects the oviposition time as well as the number of eggs laid down. Une étude menée pendant 2 années (2001 et 2002) sur la biologie de P.oleae dans une oliveraie d’Algérie située dans la région de Cap-Djenet (36°E, et 3°7N) à révélé que cette cochenille manifeste deux générations annuelles. L’hivernation touche essentiellement les femelles adultes fécondées, rarement les jeunes femelles. La fécondité est en étroite relation avec la phénologie de l’arbre et son environnement. L’élévation de la température et la poussée de sève printanière favorisent le potentiel de ponte. Par contre, les hautes températures comprises entre 30°C et 35°C diminuent la durée d’oviposition et le nombre d’œufs pondus.

Biology of Parlatoria oleae C (Homoptera, Diaspididae) in the area of Cap-Djenet (Algeria)