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| Compound | Number Positive Detected | Mean Concentration (ppb) ± SD |
|---|---|---|
| PPF | 0/30 | < 1 |
| Triflumuron | 5/25 | <15 |
| Novaluron | 13/25 | 5.2 ± 2.1 |
| Rimon EC10 | 19/25 | 27 ± 1.7 |
The mean concentration for triflumuron, novaluron, and Rimon EC10 was derived out of the samples that exhibited 15% toxicity to the larvae. All PPF samples were tested by HPLC.
