الفهرس 
The insecticidal potential and bioefficacy of selected essential ois and medicinal plant extracts on the peach fruit fly, bactrocera zonata (saunders)
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Abstract
The Peach Fruit Fly (PFF), Bactrocera zorrata (Saunders) (Diptera, Tephritidae) is a serious pest of fruits in Egypt. The public demand for insecticide-free fresh fruits encourages the use of friendly environmental biopesticides for pest control. Thus, for agricultural pest management, botanical insecticides are best suited. The objectives of the present study aims at exploring the effectiveness of certain botanical insecticides on certain biological and biochemical parameters of the peach fruit fly. The selected botanical insecticides were crude extracts (CEs) and essential oils (EOs) of Eucalyptus, Jojoba, Lavender and Neem. The insecticidal polential and the morphogenetic action of the selected plants were expressed by the mean effective concentrations (EC₅₀ values). Based on EC₅₀ values, EOs were more effective than CEs against 3 {u036C} {u0369} instar larvae as well as land 3-day old pupae of the PFF. The increment of concentrations, the increase of effectiveness, where the dead individuals, malformed individuals and degree of deformities gradually and sharply increased with the increase of concentrations of all used formulations. As to the effects of the selected botanical insecticides on certain biological parameters of the fruit fly, EOs were more effective than CEs. Neem CE was the most potent showing the lowest average of emerged adults of B. zonata.Both CEs and EOs of the tested botanical insecticides, except EOs of Jojoba and Neem, significantly inhibited AChE in treated larvae and pupae. Jojoba and Neem, however increased the amount of AChE