Pesticides bioconcentration in solid albumen and coconut water

• Grant number: 16/16566-1
• Support Opportunities: Regular Research Grants
• Start date: April 01, 2017
• End date: March 31, 2019
• Field of knowledge: Agronomical Sciences - Food Science and Technology - Food Science
• Principal Investigator: Lourival Costa Paraíba
• Grantee: Lourival Costa Paraíba
• Host Institution: Embrapa Meio-Ambiente. Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA). Ministério da Agricultura, Pecuária e Abastecimento (Brasil). Jaguariúna , SP, Brazil
• Associated researchers: Antonio Luiz Cerdeira ; Sonia Claudia Do Nascimento de Queiroz ; Vera Lúcia Ferracini

Abstract

Bioconcentration mathematical models can predict the accumulation of pesticides in food and prior knowledge of the bioconcentration factor (BCF) of a pesticide in food can contribute to the proper management of it. This project will develop a mathematical model to estimate the BCF of pesticides in water and solid albumen fruit of coconut trees treated with pesticide application. The model will be validated with values of insecticides concentrations observed in the phloem sap, water and slurry (solid albumen) of the coconut fruit. To control pests, coconut growing demand different types of insecticides, and it is known that some of these substances may accumulate in agricultural products as a result of its physicochemical characteristics. The coconut trees, necessary for the preparation of this research project will be plants grown in controlled area of Itaporanga, Experimental Field of Embrapa Coastal Tablelands, located in Aracaju, Sergipe, in which the structural and phytosanitary characteristics suitable for fruit production will be observed. The components of the fruit (pulp and water) will be used to determine concentrations of insecticides applied in the stem injection (endotherapy). The kinetic mechanisms of accumulation of pesticides in water and solid albumen fruits will be modeled. Thus, it is expected that the exposure of the fruit to insecticides via endotherapy, may be the contamination of the nutrient solution. The measurements of insecticides concentrations in elaborated sap samples, extracted from inflorescence, of the coconuts plants, water and solid albumen of coconuts will be obtained by liquid chromatography coupled to mass spectrometry (LC / MS-MS). With the observed concentrations and the mathematical model, it will be estimated both the grace period of insecticides in coconut palms and the risk that these concentrations exceed maximum residue levels allowed in food. The information and knowledge produced by the project will be useful to guide farmers who decide to minimize the risk of contamination of water and solid albumen in coconuts by insecticides. It will be studied in this project the following insecticides: acephate, acetamiprid, dimethoate, imidacloprid and thiamethoxam. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

PARAIBA, LOURIVAL C.; FERREIRA, JOANA M. S.; FERRACINI, VERA L.; RAMOS, SEMIRAMIS R. R.; CERDEIRA, ANTONIO L.; ASSALIN, MARCIA R.; PAZIANOTTO, RICARDO A. A.; SANTOS, AGNALDO J.; PARAIBA, CAROLINA C. M.. Modeling pesticide translocation injected by endotherapy into the stem of coconut tree (Cocos nucifera L.). SPANISH JOURNAL OF AGRICULTURAL RESEARCH, v. 20, n. 2, p. 12-pg., 2022-01-01. (16/16566-1)