Residual activity of PPF on
female fecundity and fertility exposed to PPF 4 days before blood meal. Mean number of eggs laid (A) and larvae (B) per female in control vs PPF exposed groups. Females were exposed to PPF at day 0 and continuously fed on sugar meal until day 4. At day 5 they were blood fed and the sterilizing effect of PPF assessed. Proportion of eggs hatched in the PPF group compared to the control group (C).