Plants affect the dissipation and leaching of anilide pesticides in soil mesocosms: Insights from compound-specific isotope analysis (CSIA)

The soil-plant system can act as a prevailing zone of pesticide dissipation in agroecosystems, which may influence leaching following rainfall events. Here we examined the contribution leaching, and degradation widely used anilide pesticides planted unplanted mesocosms with contrasting vineyard forest soils. were spiked at 25 mg/kg acetochlor, alachlor, S-metolachlor, butachlor metalaxyl, followed-up for 75 days. Successive rainfalls applied on days 45, 60 to collect leachates. Bulk soil rhizosphere samples collected evaluate dissipation. Up 14% initially was exported by leaching. first accounted 69–99% total Pesticide day ranged from 58 99% larger than mesocosms. Compound-specific stable isotope analysis (CSIA) showed that biodegradation both occurred mainly solution leached events rather bulk soil. Changes carbon values (??13C up 13.9 ± 0.5‰) S-metolachlor leachates more pronounced mesocosms, indicating predominant favoured systems, independently type. Leaching solution, ageing main processes Overall, this study emphasizes variability agricultural soils, proposes framework using CSIA examine systems.