Fertilizers are mineral associations intended to bring to the plants nutritive complements
necessary to their growth. Modern fertilizers (NPK) combine the three basic elements
which are the nitrogen (N), phosphorus (P) and potassium (K). In this study, we investigated
in tunnel apparatus the influence of aqueous solutions containing low, moderate and
high concentrations of NPK on the oviposition of Aedes aegypti. The results showed
that the solutions containing moderate concentrations (NK = 17-33 mg/l and P = 23-47
mg/l) attracted significantly more gravid females than distilled water (P < 0.001).
Conversely, the solutions containing either low or high concentrations of NPK (NK
= 8 mg/l and P = 12 mg/l; NK = 50 mg/I and P = 70 mg/l) did not induce significant
attraction (P > 0.05). These findings suggest that NPK fertilizers may influence the
egg-laying behaviour of Ae. aegypti in field situations.