1921
Volume 77, Issue 6_Suppl
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645

Abstract

At six sites in western Kenya, we explored the presence of immature stages in treeholes. larvae were found in 19 species, 13 of which are exotic. The most common exotic species were , and . In Kisumu city, longitudinal assessments of 10 flamboyant trees showed repeated presence of s.s. in treeholes with water. Production of larvae did not correlate with habitat volume but with habitat height, showing a strong but statistically insignificant negative correlation. During a dry season, eggs recovered by rinsing dry treeholes hatched into 2.5 ± 3.06 and 7.9 ± 8.2 larvae. In cage experiments, s.s. laid more eggs in water originating from treeholes than in distilled or lake water, implying preference for ovipositing in this habitat. Our findings indicate that treeholes represent a hitherto unrecognized habitat for malaria vectors, which needs further studies.

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  • Received : 25 Oct 2006
  • Accepted : 08 Jan 2007

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