Abstract
A reliable
analytical method for the simultaneous determination
of famoxadone and oxathiapiprolin dissipation kinetics as well as
the metabolites of oxathiapiprolin (IN-E8S72 and IN-WR791) in tomato
and soil was developed. We studied the dissipation of famoxadone and
oxathiapiprolin in tomatoes grown using different kinetic curves in
the area of Beijing in 2015 and 2016. Our results show that the most
suitable model for two fungicides in 2015 and 2016 was first-order
kinetic and second-order kinetic with the half-lives of 3.4 to 5.2
and 2.4 to 3.0 days, respectively. In addition, we applied the dynamic
plant uptake model dynamiCROP and combined it with results from the
field experiments to investigate the uptake and translocation of famoxadone
and oxathiapiprolin in the soil–tomato environment. Modeled
and measured results of two years fitted well with R2 values ranging from 0.8072 to 0.9221. The fractions
of famoxadone and oxathiapiprolin applied during tomato cultivation
that are eventually ingested by humans via residues in crop harvest
were finally evaluated and found to be in the range of one part per
thousand, that is one gram intake per kilogram applied.
Original language | English |
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Journal | Journal of Agricultural and Food Chemistry |
Volume | 66 |
Issue number | 32 |
Pages (from-to) | 8489-8495 |
ISSN | 0021-8561 |
DOIs | |
Publication status | Published - 2018 |
Keywords
- dissipation
- pesticides
- plant uptake model
- dynamiCROP
- half-life