Dissipation Rates of Certain Insecticides Residues in Eggplant Fruits Grown in Open Field Using QuEChERS Method and HPLC | ||||
| Assiut Journal of Agricultural Sciences | ||||
| Article 9, Volume 56, Issue 3, July 2025, Page 104-113 PDF (471.81 K) | ||||
| Document Type: Research papers | ||||
| DOI: 10.21608/ajas.2025.366346.1468 | ||||
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| Authors | ||||
Hassan G. I. Ali  1; Talat M. M. Abdelrahman Abdelrahman2; Refat O. H. Allam3
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| 1Plant Protection Department, Faculty of Agriculture, Sohag University, 82524 Sohag, Egypt. | ||||
| 2Plant Protection Department, Faculty of Agriculture, Al-Azhar University, Assiut 71524, Egypt. | ||||
| 3Plant Protection Department, Faculty of Agriculture, South Valley University, Qena, Egypt. | ||||
| Abstract | ||||
| Pesticides may remain on or in vegetable and fruit crops after application. Due to regular consumption of vegetables and fruits with pesticide residues can pose direct and indirect health concerns, making pesticide residues in vegetable and fruit crops a major global issue. This study investigates the persistence behavior and dissipation rate of chlorpyrifos, emamectin benzoate and imidacloprid in eggplant fruits following application with the label manufactured recommended rate for each pesticide. Samples of eggplant fruits were collected at 0 (1 hr. after spray), 1, 3, 5, 7, 10, and 15 days after treatment. Residues were analyzed using high performance liquid chromatography (HPLC) equipment. Residues of the tested insecticides chlorpyrifos, emamectin benzoate and imidacloprid residues persisted up to the 5th day in eggplant fruits and disappeared by the 7th day after application. No residues were detected in the untreated control fruits. On the first of application, emamectin benzoate and imidacloprid showed the highest rate of dissipation. Then residues of these insecticides declined rapidly in the first three days and then gradually until the fifth day. In contrast, the loss of chlorpyrifos showed only 12.90% dissipation rate on the first day and progressively decreased to 83.87% after five days of treatment. | ||||
| Keywords | ||||
| Chlorpyrifos; Emamectin benzoate; Eggplant; HPLC; Imidacloprid | ||||
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