dynamiCROP :: plant uptake model for dynamic assessment of human exposure from pesticide residues in food crops
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Crop-Specific Regression Models
model was fully parametrized by developing crop-specific regression models with focus on the system driving aspects, such as time to crop harvest, degradation in and on crops, residence time in soil and some substance properties. (
Database of Reference Dissipation Half-Lives
Estimated reference dissipation half-lives of 333 pesticides in crops (field conditions, 20°C) are provided. How to use the data:
1) Instead of
averaged measured half-lives
, we recommend using reference half-lives (Table 1,
Fantke et al., 2014
), considering temperature, cold storage, plant, chemical, and uncertainty.
2) Example: for abamectin, starting point is a half-life of 3.81 days (95% CI: 3.59 to 4.04 days), see Table 1, representing average abamectin dissipation across plants under field conditions at 20°C.
3) Eq. 5 can be used to correct half-lives for plant species, e.g. strawberries: log half-life = log 3.81 days (from Table 1) − 0.05 (
in Table S3,
) = 0.531 → 10^0.531 = 3.396 days, i.e. abamectin half-life in strawberries, field conditions, 20°C.
4) Eq. 5 can be further used to correct for different temperatures.
5) For pesticides not in Table 1, eq. 7 provides half-lives based on chemical properties.
These half-lives are currently too high and not reliable!
Database of Measured Dissipation Half-Lives
4513 measured dissipation half-lives of 346 pesticides in 183 crop species have been collected from 811 scientific references (more than 99% peer-reviewed) and analyzed for their variability to serve as input for
and other modeling tools assessing pesticide fate in crops. (
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