Table 2.
Knockdown time (KT50) of different monoterpenes loaded on paper discs against female adult Cx. pipiens.
| Compound | KT50 a (min) | 95% confidence limits (min) | Slopeb ± SE | Interceptc ± SE | (χ 2)d | |
|---|---|---|---|---|---|---|
| Lower | Upper | |||||
| PD1 | 17.200 | 14.800 | 19.400 | 5.786 ± 0.334 | −7.152 ± 0.447 | 46.12 |
| PD2 | 35.900 | 34.300 | 37.400 | 7.635 ± 0.421 | −11.871 ± 0.667 | 15.281 |
| PD3 | 27.445 | 25.919 | 28.913 | 8.419 ± 0.470 | −12.111 ± 0.694 | 20.666 |
| PD4 | 20.799 | 19.224 | 22.287 | 7.35 ± 0.433 | −9.688 ± 0.595 | 24.426 |
| PD5 | 37.329 | 36.035 | 38.639 | 6.286 ± 0.356 | −9.882 ± 0.566 | 7.304 |
| PD6 | 33.205 | 31.399 | 34.991 | 6.054 ± 0.329 | −9.210 ± 0.514 | 16.426 |
| PD7 | 28.726 | 26.764 | 30.651 | 4.897 ± 0.260 | −7.141 ± 0.396 | 17.673 |
aKnockdown times required to kill 50% of the population exposed.
bSlope of the regression line ± standard error (SE).
cIntercept of the regression line ± SE.
dChi square value.
PD: paper discs.
PD1: immobilization of blend of ketone monoterpenes (camphor, menthone, carvone, and fenchone) on paper discs.
PD2: immobilization of blend of alcohol monoterpenes (geraniol, thymol, and menthol) on paper discs.
PD3: immobilization of blend of alkene monoterpenes (limonene and camphene) on paper discs.
PD4: PD1 + citronella oil on paper discs.
PD5: PD2 + citronella oil on paper discs.
PD6: PD3 + citronella oil on paper discs.
PD7: immobilization of citronella oil on paper discs.