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Table 3 Effect of pyriproxyfen (PPF) exposure of female mosquito on hatching of her eggs

From: Pyriproxyfen for mosquito control: female sterilization or horizontal transfer to oviposition substrates by Anopheles gambiae sensu stricto and Culex quinquefasciatus

Anopheles gambiae s.s.

Exposure time to PPF in relation to blood meal

Mean proportion eggs hatched* (95% CI)

Proportion reduction in hatched larvae (95% CI)

Odds ratio (95% CI)

p-value

72 hours after

0.86 (0.85-0.87)

0

0.99 (0.80-1.23)

0.910

48 hours after

0.84 (0.82-0.85)

0

0.99 (0.82-1.19)

0.910

24 hours after

0.22 (0.19-0.24)

0.73 (0.71-0.77)

0.06 (0.05-0.09)

<0.001

0.5 hours after

0.19 (0.17-0.23)

0.77 (0.73-0.80)

0.05 (0.03-0.07)

<0.001

0.5 hours before

0.21 (0.18-0.23)

0.75 (0.72-0.78)

0.06 (0.05-0.08)

<0.001

24 hours before

0.24 (0.22-0.27)

0.71 (0.68-0.73)

0.08 (0.06-0.11)

<0.001

48 hours before

0.54 (0.51-0.56)

0.35 (0.34-0.38)

0.27 (0.22-0.34)

<0.001

Control

0.84 (0.83-0.85)

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1

 

Culex quinquefasciatus

Exposure time to PPF in relation to blood meal

Mean no. of larvae hatched per egg raft ** (95% CI)

Proportion reduction in hatched larvae (95% CI)

Odds ratio (95% CI)

p-value

144 hours after

76.4 (75.3-77.5)

0.07 (0.05-0.09)

0.94 (0.89-0.98)

0.008

48 hours after

66.0 (60.6-72.0)

0.19 (0.16-0.21)

0.81 (0.77-0.86)

<0.001

24 hours after

66.4 (63.7-69.2)

0.18 (0.14-0.22)

0.82 (0.77-0.87)

<0.001

0.5 hours after

67.8 (59.9-76.8)

0.17 (0.10-0.23)

0.83 (0.70-0.99)

0.035

0.5 hours before

61.9 (56.2-68.2)

0.24 (0.18-0.29)

0.76 (0.69-0.83)

<0.001

24 hours before

72.9 (65.0-81.7)

0.10 (0.5-0.16)

0.90 (0.76-1.03)

0.130

48 hours before

51.2 (49.4-53.0)

0.37 (0.34-0.40)

0.63 (0.60-0.66)

<0.001

Control

81.4 (76.6-86.6)

-

1

 
  1. *Eggs were counted for An. gambiae s.s. and the proportion that hatched calculated.
  2. **The number of eggs per egg raft was not counted. Comparisons are made between mean numbers of larvae per egg raft.