African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6574

Full Length Research Paper

Dissipation rate of different commercial formulations of malathion applied to tomatoes

Sherif H. Abd-Alrahman1* and I. A. Osama2
  1Department of Biochemistry, College of Science, King Saud University, Riyadh, Saudi Arabia. 2Department of Pesticides Residues and Environmental Pollution, Central Agricultural Pesticide Laboratory, Agricultural Research Center, Giza 12618, Egypt.
Email: [email protected]

  •  Accepted: 17 July 2012
  •  Published: 02 October 2012

Abstract

 

Dissipation of malathion following one application of different commercial formulations of Malathion 57% EC, Malathiom-kemanova 57% EC, Malatox 57% EC and Actathion 57% EC were estimated by employing optimized QuEChERS technique and gas chromatography with flame photometric detector (GC-FPD). The average recoveries of malathion on tomato for fortification levels of 0.01 and 1.0 mg kg−1 were observed to be 91.7 and 96.9%, respectively. The LOQ for tomato was found to be 0.1 μg kg−1. Malathion residue was dissipated below its maximum residue limit (MRL) of 0.5 after 14 days. Half-life and preharvest interval (PHI) were calculated to be 2.88 (13), 3.59 (14), 3.58 (11), 3.21 (11) days for Actathion, Malatox, Malathiom-kemanova and Malathion, respectively. These data could provide guidance for the proper and safe use of malathion on tomato.

 

Key words: Dissipation, malathion, formulation, tomatoes, QuEChERS