Bouazza, I., & Guénaoui, Y. 2015 Density Infestations of Parlatoria ziziphii (Lucas) (Hemiptera: Diaspididae) on Citrus in the Northwestern Algeria. Proceedings of the SixthInternational Scientific Agricultural Symposium, Agrosym 2015 2015: 793-798
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Notes: In Mostaganem area (Northwestern Algeria), a study on scales infesting citrus conducted during three years (1996-98) showed a predominance of Parlatoria ziziphii (Lucas) (Hemiptera: Diaspididae) with the hypothesis of destruction of its natural enemies by overuse of pesticides. The main objective of the present work was to analyze the role of different biotic and abiotic factors on seasonal abundance of scales infesting fruits. The parasitism was very low (about 0, 25%) in September and October, increasing to about 10% in November. Through a field investigation we tried to identify real factors limiting effectiveness of natural enemies.
