Insecticidal activity of citrus peel oil of navel orange against the striped mealybug Ferrisia virgata (Hemiptera: Pseudococcidae)‎ and the mango shield scale Milviscutulus mangiferae (Hemiptera: Coccidae)‎

الملخص EN

Essential oil extracted from peels of citrus fruit namely navel orange (Citrus sinensis L.), belonging to family Rutaceae was tested for its insecticidal activity at four different concentrations (500, 1000, 2500, and 5000ppm) against nymphs and adults of the striped mealybug Ferrisia virgata Cockerell (Hemiptera, Pseudococcidae) and mango shield scale or mango soft scale Milviscutulus mangiferae (Green) (Hemiptera: Coccidae).

Formulated oils of navel orange was bioassayed against mealybug F.

virgata and M.

mangiferae.

The results revealed that, the two formulated oils of navel orange achieved high toxicity against nymphs and adults of F.

virgata and M.

mangiferae .

The essential oil of navel orange was isolated by hydrodistillation and the analysis of essential oil by GC/MS revealed the presence of 35 peaks, approximately all peaks were identified.

The chemical composition showed that limonene was the main constituent in citrus oil (78.15%).

The results of the present study suggested that, formulated navel orange oil used as safe, potential natural products for control of F.

virgata and M.

mangiferae infesting mango and guava trees and may be used as alternatives to the reference products after application of these results in the semifield and field experiments.