Document Type : Original Article
Authors
1
Pests & Plant Protection Dept., National Research Centre, Dokki, Cairo, Egypt
2
Pesticide Residues and Environmental Pollution Dept., Central Agricultural Pesticide Laboratory, Agricultural Research Center, Dokki, Giza, Egypt
3
Plant Protection Dept., Faculty of Agriculture, Monifia Univ., Shebien, Egypt
Abstract
Pesticide residues monitoring is an important method for protecting consumers from the possible adverse effects of pesticides. Therefore, this study aimed to assess the residues of four insecticides belonging to different chemical groups in strawberry and pear fruit. The impact of washing and some food processes on residue elimination and the potential health risks to consumers as a result of direct exposure to the consumption of these fruits were also studied. The initial deposit values of acetamiprid and lambda-cyhalothrin were 0.79 and 1.27 mg/kg in pear fruit; and 0.58 and 0.74 mg/kg for emamectin and spinosad in strawberry fruits. These insecticide residues lost 20.25, 33.85, 36.2, and 31.08 % of their amounts, respectively, one day after application. Moreover, the half-lives of the above insecticides were 3.96, 2.21, 1.93, and 2.19 days, with decomposition rates of 0.175, 0.313, 0.359, and 0.317, respectively. According to health risks, the EDI of pear fruits treated with lambda-cyhalothrin exceeded the ADI in fruits collected at 0, 1, and 3 days, and strawberry fruits treated with emamectin just after spraying; therefore, it was considered to be a risk for consumers. The results also showed that the wash-and-compote or jam processes played a significant role in removing most of the contaminated residues. For strawberries, wash and jam remove 100% of spinosad residues, so these fruits can be consumed safely immediately after insecticide application. In addition, processing factors (PF) for the tested insecticides were evaluated to perform an acute risk assessment of dietary exposure. This type of study is needed to more realistically determine the dietary intake of insecticides and assess their health risks.
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