Behaviour of Metribuzin and Trifluralin in soil and their uptake by soybeans

Abstract

The movement and persistence of Metribuzin and Trifluralin pesticides in soil and uptake into soybeans (Glycine max (L.) Merrill), under field conditions was examined using gas chromatography. Metribuzin was quickly lost from soil, hall the dose of 210 g/ha remaining after about nine days and half of 630 g/ha alter twelve days. Trifluralin persisted longer, half a dose of 670 g/ha remaining after 38 days and half 1,110 after 61 days. Both compounds leached little and irrigation was insufficient to influence their behaviour. Trifluralin was not found in soybean plants but the small amounts of Metribuzin found in plants was sufficient to damage them.