Effect of some natural compounds on Aonidiella Aurantii (Maskell) (Hemiptera; Coccoidea: Diaspididae) and its parasitoid Comperiella Lemniscata compere and annecke (Hymenoptera: Encyrtidae) on citrus in Egypt [electronic resource].

Includes references.

Aonidiella aurantii (Maskell) (Hemiptera; Coccoidea: Diaspididae) is a serious pest on various economic crops in Egypt. The main injury caused by this insect is the ingestion of plant sap. Severely infested plants grow poorly, may drop their leaves prematurely and can suffer dieback of twigs and branches. The encyrtid parasitoid, Comperiella /emniscata Compere and Annecke (Hymenoptera: Encyrtidae) has been recorded as an effective parasitoid of armored scale insects in various parts of the world, including Egypt. The present paper describes some laboratory and field tests on the effect of KZ oil, Neemex, Sulphur and Actalic compounds on A. aurantii and its parasitoid. In the laboratory tests, five concentrations of KZ oil, Neemex, Sulphur and Actalic were used; twenty infested leaves of citrus were dipped in each concentration for five seconds. leaves were divided into five replicates. Five leaves were dipped in clean water as untreated controls. The cultures was maintained at room temperature about 25:i:1°C and 65:i:1% relative humidity. After 24 hours, the live A. aurantll end parasitoids were counted.. The results suggested that: the potency of KZ oil, Neemex, Sulphur and Actalic varied greatly between compounds and concentrations. Also the results suggest that when adult female and nymphal A. aurantii and the adult parasitoid were treated with the these chemicals, the percentage mortality ranged from 74.0-95% with KZ oil, 45.0-89.4% with Neemex, 57.2-93.8% with Sulphur and 82.5-100% with Actalic respectivel¥. In field tests, two fields were selected.

Summary in Arabic.

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