Table 5.
Detection rate of various pesticides in different areas of Henan province.
| Pesticide | No. of samples (n) Detection rate | P | ||||
|---|---|---|---|---|---|---|
| Eastern Henan | Western Henan | Southern Henan | Northern Henan | Central subregion of Henan | ||
| Procymidone | 79(38%) | 119(10.9%) | 86(22.1%) | 77(14.3%) | 238(37.4%) | 0.000 |
| Cypermethrin | 251(21.5%) | 200(20.5%) | 251(13.5%) | 190(14.7%) | 642(14.0%) | 0.019 |
| Lambda-cyhalothrin | 213(18.8%) | 188(10.1%) | 220(8.2%) | 174(6.9%) | 573(11.7%) | 0.001 |
| Pendimethalin | 142(3.5%) | 95(0%) | 138(2.2%) | 87(4.6%) | 377(4.5%) | 0.225 |
| Isocarbophos | 34(0%) | 33(0%) | 44(2.3%) | 40(42.5%) | 65(3.1%) | 0.747 |
| Isazophos | 87(0%) | 76(0%) | 94(0%) | 73(0%) | 151(0%) | NA |
| Fenthion | 46(0%) | 40(0%) | 63(0%) | 47(0%) | 102(0%) | NA |
| Deltamethrin | 38(0%) | 38(0%) | 33(0%) | 33(0%) | 99(0%) | NA |
NA, Not applicable. Bold values indicates detection limit.