Effect of Polygonum hydropiper L. against dengue vector mosquito Aedes albopictus L.

Parasitol Res

Entomology Research Institute, Loyola College, Chennai, 600 034, Tamil Nadu, India,

Published: September 2014

AI Article Synopsis

  • The study evaluated the effectiveness of essential oil and an isolated compound from Polygonum hydropiper L. against the dengue vector mosquito Aedes albopictus.
  • Various concentrations of essential oil and the isolated compound were tested for their ability to kill mosquito larvae, repel adult mosquitoes, and prevent egg laying.
  • The isolated compound, confertifolin, showed significant mosquitocidal activities, achieving 100% effectiveness in killing larvae and eggs at specific concentrations, making it a promising candidate for mosquito control.

Article Abstract

The present study aimed to evaluate the essential oil and an isolated compound from the leaves of Polygonum hydropiper L. against dengue vector mosquito Aedes albopictus L. The plant material was macerated and steam distilled using clavenger apparatus for oil extraction. The essential oil was tested at different concentrations of 100, 50, 25, 12.5 and 6.25 ppm concentrations against the larvae of Ae. albopictus. The isolated compound was tested for larvicidal, ovicidal, repellent, oviposition deterrent and adulticidal activities at 10, 5, 2.5, 1.25 and 0.625 ppm concentrations. The essential oil exhibited LC₅₀ values of 194.63 and 199.65 and confertifolin exhibited LC₅₀ values of 2.02 and 3.16 against the second and fourth instar larvae of Ae. albopictus, respectively. The ovicidal activity of 100% on 0- to 6-h-old eggs, repellent activity of 320.6 min, oviposition deterrent activity of 98.51% and adulticidal activity of 100% at 10 ppm concentration of confertifolin were recorded. No mortality of was observed in negative control. To the best of our knowledge, this is the first report on the potential mosquitocidal activities of confertifolin against Ae. albopictus.

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Source
http://dx.doi.org/10.1007/s00436-014-4037-zDOI Listing

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