Toxicity of Insecticides in the Adult and Larva Olive Fruit Fly, after Estimation of the Dislodgeable Foliar and Fruit Residues in Olive Trees by LC-MS/MS and GC-MS/MS

Eleftheria Bempelou (), Kyriaki Varikou, Chris Anagnostopoulos, Angeliki Charalampous, Nikolia Samari, Leonidas Economou, Nikolaos Garantonakis and Konstantinos Liapis
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Eleftheria Bempelou: Laboratory of Chemical Control of Pesticides, Scientific Directorate of Pesticides’ Control and Phytopharmacy, Benaki Phytopathological Institute, 14561 Athens, Greece
Kyriaki Varikou: Institute for Olive Tree, Subtropical Crops and Viticulture, ELGO-DIMITRA, L. Karamanli 167, 73100 Chania, Greece
Chris Anagnostopoulos: Laboratory of Pesticide Residues, Scientific Directorate of Pesticides’ Control and Phytopharmacy, Benaki Phytopathological Institute, 14561 Athens, Greece
Angeliki Charalampous: Laboratory of Pesticide Residues, Scientific Directorate of Pesticides’ Control and Phytopharmacy, Benaki Phytopathological Institute, 14561 Athens, Greece
Nikolia Samari: Laboratory of Pesticide Residues, Scientific Directorate of Pesticides’ Control and Phytopharmacy, Benaki Phytopathological Institute, 14561 Athens, Greece
Leonidas Economou: Laboratory of Efficacy Control of Pesticides, Scientific Directorate of Pesticides’ Control and Phytopharmacy, Benaki Phytopathological Institute, 14561 Athens, Greece
Nikolaos Garantonakis: Institute for Olive Tree, Subtropical Crops and Viticulture, ELGO-DIMITRA, L. Karamanli 167, 73100 Chania, Greece
Konstantinos Liapis: Laboratory of Pesticide Residues, Scientific Directorate of Pesticides’ Control and Phytopharmacy, Benaki Phytopathological Institute, 14561 Athens, Greece

Agriculture, 2023, vol. 13, issue 3, 1-17

Abstract: “Can systemic insecticides be used in bait spots in order to kill the adult olive fly?” Effort was directed toward providing an answer to that question. Both field and laboratory tests were implemented to detect the dislodgeable residues of dimethoate, phosmet and b-cyfluthrin in olive leaves and fruit using the LC-MS/MS and GC-MS/MS chromatographic techniques. Residues of dimethoate declined more over time than those of phosmet, while levels of beta-cyfluthrin remained almost stable, both in leaves and fruit. Additionally, significantly higher and faster toxicity of dimethoate and beta-cyfluthrin (>92%) compared to phosmet (80%) to fly adults was shown, which was reduced significantly after a two-week period. Conversely, 100% mortality of the larval stages within olive flesh was observed at the 2nd day for dimethoate and at the 7th day for phosmet. Although phosmet was not expected to contribute to preventing larval development, its application in bait sprays presented similar toxicity to that of dimethoate. However, no larval toxicity was recorded in beta-cyfluthrin. As a primary conclusion, we recommend the avoidance of the use of systemic insecticides in bait sprays.

Keywords: dislodgeable residues; bait spays; olive leaves; olive fruit; olive fly; toxicity (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2023
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