Hygienic evaluation of residual spirodiclofen in fruit and vegetable crops after use of spirodiclofen-based insecticide-acaricide in the agro-industrial sector and private households of Ukraine

Abstract

ABSTRACT. Objectives. THygienic evaluation of residual spirodiclofen and regulation of the use of spirodiclofen-based product Envidor SC 240 for fruit and vegetable crops in the agro-industrial sector and private households of Ukraine. Methods. Study of changes in residual spirodiclofen in apples, pears, grapes, cucumbers and eggplants overtime was performed in different agroclimatic zones of Ukraine during field experiments. Consumption rates of spirodiclofen were 120 g/ha as two applications, and 144 g/ha as 3 applications in the agro-industrial sector, and 1.2 g/0.01 g as two applications at private households. Residual spirodiclofen in the test samples of agricultural products was measured using chemical analytical methods of high-performance liquid chromatography (HPLC). Results. Results of conducted studies suggest a moderate reduction in the residual amounts of the active ingredient in fruit crops and the rapid one in vegetable crops. It was found that during harvesting, spirodiclofen content in apples and pears did not exceed MAL (maximum allowable limit); spirodiclofen was not detectable in grapes, eggplants and cucumbers. Calculation of half-lives of the test substance in the treated plants during vegetation was performed. Theoretically, the possible intake of spirodiclofen in an adult and a child under the age of 6 years with fruit, vegetable crops, and grapes was calculated. The obtained data were evaluated by the level of acceptable daily intake (ADI) of the substance in the human body. Conclusion. As per limiting toxicity parameters under conditions of the acute experiment, spirodiclofen and spirodiclofen-based product belong to hazard class 2 pesticides. By a degradation value in plants, spirodiclofen belongs to hazard class 1–4 pesticides. Approved MALs of safe content of the substance under experiment in fruit and vegetable crops, grapes and safety interval before harvesting provide for safe use of spirodiclofen-based insecticide-acaricide. Key Words: spirodiclofen, residual amounts of pesticides, field experiments.