Prediction of pesticide migration in soils: The role of experimental soil control

Study of cyantraniliprole sorption in soils of Russia

“…At the first, 10 g of air-dried soil samples were sifted through a 1 mm sieve and placed in flasks, then 20 ml of 0.01M solution of CaCl2 were added and flasks were shaken for 4 hours before the experiment. After that, 5 ml of the test compound solution was added into the flasks to bring the final volume to 25 cm 3 and to obtain сyantraniliprole concentration of 0.5; 0.2; 0.1; 0.05 and 0.02 μg/ml. The flasks were placed on a mechanical shaker; samples were taken for analysis after 16 hours.…”

“…In the Russian Federation, cyantraniliprole was registered in 2019 as the active substance of insecticides recommended for pest control in plantings of cabbage, tomatoes, cucumbers and onions [1]. Laboratory filtration experiments showed high mobility of cyantraniliprole [2,3]. In the lysimeter experiment cyantraniliprole was found in the leachate 2 weeks after its application (after heavy showers), and also was found in most samples during the experiment [4].…”

Migration of cyantraniliprole in fractured soils: calibration of pesticide leaching model by using experimental data

“…Higher values of this parameter are typical for soils with a high clay content and uneven pore space with preferential migration flows [15]. In previous works [16] it was shown that the dispersivity length can be used to configure the PERL model. In our previous studies [17] the values of dispersivity length were determined for monoliths (d = 10 cm, h = 30 cm) of agrosoddy-podzolic soil in laboratory conditions.…”

“…In previous works [16] it was shown that the dispersivity length can be used to configure the PERL model. In our previous studies [17] the values of dispersivity length were determined for monoliths (d = 10 cm, h = 30 cm) of agrosoddy-podzolic soil in laboratory conditions. But for subsequent modeling in experimental support it is necessary to divide the soil profile into layers, and a length of 30 cm may exceed the horizon thickness, a "scale problem" arises.…”