Abstract：
Lettuce, a globally consumed nutritious vegetable, is often linked to concerns regarding pesticide residues. To address this issue, we conducted field trials and utilized dynamiCROP modeling to examine the uptake, distribution, translocation, and dissipation of five pesticides (λ-cyhalothrin, difenoconazole, acetamiprid, dimethomorph, and β-cypermethrin) commonly detected in lettuce. At harvest, pesticides residues were below the maximum residue limits (MRLs) at 0.05, 0.39, 0.047, 0.72, and 0.072 mg kg-1, respectively. Simulation results elucidated distinct behaviors of the pesticides following application to lettuce foliage across various compartments. However, all pesticides exhibited a common dissipation trend, initially stabilizing or increasing before gradually declining. For all five pesticides, the largest contribution of residues on lettuce leaves came from the leaf surface during the early period after application, and from the soil in the long term. Health risk assessments indicated negligible risks associated with consuming lettuce containing these pesticides, both in the short and long term.
摘要：
生菜,一种全球消费的营养蔬菜，通常与农药残留有关。为了解决这个问题，我们进行了田间试验，并利用dynamiCROP建模来检查吸收，分布，易位,和五种农药的消散(λ-氯氟氰菊酯，苯醚甲环唑,啶虫脒,烯酰吗啉,和β-氯氰菊酯）通常在生菜中检测到。在收获的时候，农药残留低于最大残留限值（MRL），分别为0.05、0.39、0.047、0.72和0.072mgkg-1。模拟结果阐明了农药在不同隔室中施用到生菜叶子后的不同行为。然而,所有农药都表现出共同的消散趋势，最初稳定或增加，然后逐渐下降。对于所有五种杀虫剂，在施用后的早期，莴苣叶片上的残留物的最大贡献来自叶片表面，从长远来看，来自土壤。健康风险评估表明，食用含有这些农药的生菜的风险微不足道，无论是短期还是长期。
