Effects of forced egg-retention in Aedes albopictus on adult survival and reproduction following application of DEET as an oviposition deterrent

J Vector Ecol. 2005 Jun;30(1):45-8.

Abstract

The insect repellent DEET (0.1% concentration), used as a mosquito oviposition deterrent in the laboratory, influenced the retention and maintenance of mature eggs by caged gravid female Aedes albopictus Skuse. This egg-retention mechanism could benefit survival because the gravid females were ultimately able to lay maintained eggs upon availability of water, but the length of forced egg-retention time reduced the number of eggs laid per female. Gravid females with retained eggs also laid a higher percentage of eggs that failed to tan, and this percentage increased with time duration of egg-retention. Percent egg hatch was not significantly affected by DEET when used as an oviposition deterrent; however, percent hatch was affected by time duration of egg-retention in both treated (exposed to DEET) and untreated (control) gravid females. The rate of egg hatch was considerably reduced after three weeks of retention; this reduction declined to zero for treated and control females at six and four weeks post-treatment, respectively. The fecundity and fertility of gravid female Ae. albopictus were affected by the time duration of forced egg-retention.

MeSH terms

  • Aedes / drug effects
  • Aedes / physiology*
  • Animals
  • DEET / pharmacology*
  • Female
  • Fertility / drug effects
  • Insect Repellents / pharmacology*
  • Insect Vectors / drug effects
  • Insect Vectors / physiology*
  • Mosquito Control / methods*
  • Oviposition / drug effects*
  • Oviposition / physiology
  • Ovum / drug effects
  • Ovum / physiology

Substances

  • Insect Repellents
  • DEET