Hygienic assessment of the kotofor herbicide circulation in the soil-plant system when applied in agriculture

Abstract

One important issue from a hygienic point of view is the study of the behavior of herbicides in various environmental objects, and numerous studies have proved that the stability of the triazine group of herbicides in the soil depends on temperature, humidity, and the content of organic substances (M.A. Alieva 1992, V.A. Anpalov 1999, M.Ya. Berezovsky 2001). Therefore, in some types of soil, these herbicides accumulate, while in others they quickly decompose. At the same time, there is a direct correlation between the consumption rates of the herbicide and the value of its residue in the soil and food products, the concentration of the maximum Kotofor amounts in the surface layer is explained on the one hand, low volatility from the soil surface, and on the other, a relatively high content of organic substances in its surface layer. With an increase in the consumption rate to 3.0 and 4.0 kg/ha, Kotofor was found under furrow and sprinkler irrigation conditions only in the surface soil horizon (0–10 cm) in amounts of 0.010 ± 0.001–0.020 ± 0.003 and 0.020 ± 0.001–0.030 ± 0.003 mg/kg, respectively). Based on the conclusion of the foregoing, it can be concluded that the Kotofor herbicide is mainly adsorbed in the surface soil horizon (0-20cm). The degree of concentration of Kotofor residues in the soil was in direct proportion to its consumption rates. When using Kotofor in the conditions of sprinkling irrigation, the amount of its residues in the soil was 9.3–16.0% higher than with the furrow irrigation method (P <0.05). A constant increase in the assortment and quantity of applied pesticides and the expansion of their use in various areas of the national economy lead to an increase in their possible pathways to food products (E.A. Antonovich 1999, E.I. Goncharuk 1999).