, Research Notes

Persistence of diazinon, malathion and parathion in coriander (Coriamdrum sativum L.), cultivated in barbacoas. (343)

Research Notes
Gretty Ettiene
Department of Chemistry, Agronomy Faculty, Zulia University, Post Office Box 15202, Maracaibo, Venezuela.
Silvia Ortega
Division of Agricultural Extension, Agronomy Faculty, Zulia University, Post Office Box 15202, Maracaibo, Venezuela.
Deisy Medina
Department of Chemistry, Agronomy Faculty, Zulia University, Post Office Box 15202, Maracaibo, Venezuela.
Judith Sepúlveda
Department of Chemistry, Agronomy Faculty, Zulia University, Post Office Box 15202, Maracaibo, Venezuela.
Ignacio Buscema
Department of Chemistry, Agronomy Faculty, Zulia University, Post Office Box 15202, Maracaibo, Venezuela.
Luis Sandoval
Agronomics Research Institute, Agronomy Faculty, Zulia University, Post Office Box 15202, Maracaibo, Venezuela
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Keywords

Persistence
Coriamdrum sativum L.
Organophosphorus

How to Cite

Persistence of diazinon, malathion and parathion in coriander (Coriamdrum sativum L.), cultivated in barbacoas. (343). (2005). Tropical Agriculture, 82(4). https://journals.sta.uwi.edu/ojs/index.php/ta/article/view/1320
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Abstract

Three organophosophorus pesticides were evaluated to determine their persistence in coriander (Coriamdrum sativum L.), an aromatic vegetable that is consumed both fresh and cooked in the Venezuelan diet. In the municipality of San Francisco, Zulia, Venezuela, the indiscriminate use of malathion, parathion, and diazinon was confirmed. These were used to control several pests that attack coriander plants, thus resulting in the presence of pesticide residue in crops. These residues constitute a health hazard to consumers. The residue concentration was monitored over time, beginning the day of application (Day zero) up to Day 20. The three pesticides followed a first-order kinetic pattern, with half-lives (t1/2) of 2.16 for diazinon, 2.09 for malathion, and 2.04 for parathion. At Day 18, residue concentration was below the Maximum Residue Limits (MRLs). Significant differences (P < 0.05) were found between pesticide concentration and its dissipation time in coriander crops.
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