Residues of rotenone, azadirachtin, pyrethrins, and copper used to control Bactrocera oleae (Gmel.) in organic olives and oil

Vito Simeone (1) , Nuray Baser (1) , Donato Perrelli (2) , Gianluigi Cesari (1) , Hamid El Bilali (1) , Patrizia Natale (2)

1 Organic Agriculture
2 Agri-Food

Abstract Rotenone, azadirachtin, pyrethrins and copper decay curves were determined in olive and oil samples after that trials consisting in one, two, and three applications of each active ingredient were carried out twice in the years 2005 and 2006. Rotenone, azadiracthin and pyrethrins were extracted with acetonitrile and determined by liquid chromatography; copper was extracted in a HCl aqueous solution and determined by chemical stripping. Pyrethrins were always found in amounts below the limits accepted, whereas rotenone and copper residues always exceeded, after the preharvest interval, the maximum threshold allowed for olives. As regards the residues in the oil, rotenone was found in concentrations higher than those detected on the olives. Copper tended to accumulate in the olives according to the number of applications, whereas in the oil the residue always proved to be lower than the maximum limit accepted. The sensitivity of the method applied did not allow the detection of azadirachtin.

Mots clés: Life Sciences

Vito Simeone, Nuray Baser, Donato Perrelli, Gianluigi Cesari, Hamid El Bilali, et al.. Residues of rotenone, azadirachtin, pyrethrins, and copper used to control Bactrocera oleae (Gmel.) in organic olives and oil. Food Additives and Contaminants, 2009, 26 (04), pp.475-481. ⟨10.1080/02652030802562938⟩. ⟨hal-00577348⟩