Fig. 1

Detected pesticide levels in 35 tested samples of honey from the stingless bee Melipona subnitida
| Sample number | Municipality | Collection site | Chlorpyrifos-methyl (mg/kg) | Monocrotophos (mg/kg) | Trichlorfon (mg/kg) |
|---|---|---|---|---|---|
| 1 | Alto do Rodrigues | Countryside | n.d.a | 0.055 | n.d. |
| 2 | Barcelona | Countryside | n.d. | n.d. | n.d. |
| 3 | Galinhos | Countryside | n.d. | n.d. | n.d. |
| 4 | Governador Dix-Sept Rosado | Countryside | n.d. | 0.072 | n.d. |
| 5 | Jandaíra | Urban | n.d. | n.d. | n.d. |
| 6 | Jandaíra | Urban | n.d. | 0.038 | n.d. |
| 7 | Jandaíra | Countryside | n.d. | 0.057 | n.d. |
| 8 | Jandaíra | Countryside | n.d. | n.d. | n.d. |
| 9 | Jandaíra | Countryside | n.d. | 0.015 | n.d. |
| 10 | Jandaíra | Countryside | n.d. | 0.021 | n.d. |
| 11 | Jandaíra | Urban | < LOQb | 0.049 | < LOQ |
| 12 | Mossoró | Urban | n.d. | 0.081 | n.d. |
| 13 | Mossoró | Urban | n.d. | 0.018 | n.d. |
| 14 | Mossoró | Urban | n.d. | 0.057 | n.d. |
| 15 | Mossoró | Urban | n.d. | 0.033 | < LOQ |
| 16 | Mossoró | Urban | n.d. | n.d. | n.d. |
| 17 | Mossoró | Urban | n.d. | n.d. | n.d. |
| 18 | Mossoró | Urban | n.d. | 0.062 | < LOQ |
| 19 | Mossoró | Urban | n.d. | 0.050 | 0.023 |
| 20 | Pau dos Ferros | Countryside | n.d. | n.d. | n.d. |
| 21 | Riachuelo | Countryside | n.d. | 0.037 | n.d. |
| 22 | Riachuelo | Countryside | < LOQ | n.d. | n.d. |
| 23 | São Francisco do Oeste | Urban | n.d. | 0.061 | n.d. |
| 24 | São Francisco do Oeste | Urban | n.d. | 0.052 | n.d. |
| 25 | São Francisco do Oeste | Countryside | n.d. | 0.074 | n.d. |
| 26 | São Francisco do Oeste | Countryside | n.d. | 0.011 | n.d. |
| 27 | São Francisco do Oeste | Countryside | n.d. | n.d. | n.d. |
| 28 | São Paulo do Potengi | Countryside | n.d. | n.d. | n.d. |
| 29 | São Paulo do Potengi | Countryside | n.d. | n.d. | n.d. |
| 30 | Serra do Mel | Countryside | n.d. | 0.043 | 0.074 |
| 31 | Serra do Mel | Urban | n.d. | 0.033 | 0.059 |
| 32 | Serra do Mel | Countryside | n.d. | 0.046 | n.d. |
| 33 | Serra do Mel | Countryside | n.d. | 0.056 | n.d. |
| 34 | Serra do Mel | Countryside | n.d. | 0.024 | n.d. |
| 35 | Tibau | Countryside | n.d. | 0.101 | n.d. |
| Median (mg/kg) | 0 | 0.049 | 0 | ||
| Minimum (mg/kg) | 0 | 0 | 0 | ||
| Maximum (mg/kg) | 0.005 | 0.101 | 0.074 | ||
| MRLc (mg/kg) | 0.050 | 0.010 | 0.010 | ||
| Samples >MRL | 0 | 24 | 2 | ||
| % samples >MRL | 0 | 68.6 | 5.71 | ||