Abstract
Background and Objective: The continuous use of pesticides in the ecosystem is of great concern, as some of them are highly stable and impact non-target organisms. The effect was tested of different concentrations of insecticides such as (Deltamethrin and Malathion) and natural products, Including, lemongrass oil on Fruit Fly (Drosophila melanogaster), to calculate the concentration at which the highest mortality occurred and death half the number of individuals after 96 hrs, as well as calculating the half-lethal time for individuals. Materials and Methods: This study, which evaluated the toxicity of five different concentrations (0.75, 1.00, 1.25, 1.50 and 1.75 mg L1) of Malathion, (0.05, 0.10, 0.21, 0.53 and 1.48 mg L1) of Deltamethrin and lemongrass oil (0.25, 0.50, 0.75, 1.00 and 1.50 mg L1) on the insect of Drosophila melanogaster after 96 hrs of treatment. Results: From the results of this study, the concentration (LC50 = 2.938 mg L1) of Malathion leads to kills half of the individuals, compared to Deltamethrin a higher concentration (LC50 = 4.8673 mg L1) that leads to killing half of the individuals. While lemongrass oil the concentration (LC50 = 9.7478 mg L1) leads to kills half of individuals. Also, when used Deltamethrin it takes (LT50 = 660.277) hours to kill half of the individuals compared to Malathion, which takes approximately (LT50 = 321.862) hours to death half of the individuals. But lemongrass oil (LT50 = 819.745) hours to kill half of the individuals. Conclusion: In conclusion, the lemon plant and its components have excellent potential for being used in the control of Drosophila melanogaster, which had an effective role in biological control.
