Influence of seed and feel aqueous extracts of Lansium Domesticum Correa (MELIACEAE) on larval anal papillae, larval survival and host searching behavior of female adult mosquito, Aedes Aegypti (Diptera : Cullicidae)

Date

4-2011

Degree

Bachelor of Science in Agriculture

Major Course

Major in Entomology

College

College of Agriculture and Food Science (CAFS)

Adviser/Committee Chair

Ceballo, Flor A

Abstract

The effect of peel and seed water-extracts of Lansium domesticum on the larval anal papillae, larval survival and host searching behavior of female adult mosquito Aedes aegypti was determined under laboratory conditions. Preparations of the test solution involve the following: 25% and 50% seed; 25% and 50% peel. Comparison for the host-searching behavior of female adult mosquito is made through the use of a commercial insecticide. The experiment was conducted in the Institute of Biological Sciences Building, Entomology wing from December 2010 to February 2011. Mosquito larvae exposed to aqueous extracts of lansones had 0% survival upon exposure. Water-extracts from seeds (25%, 50%) recorded survival rate of less than 50% in 48 hr after exposure. Exposure of 2nd and 3rd instar mosquito larvae to different seed and peel water-extracts triggered varying morphological changes in the anal papillae compared to that of larvae with no treatment and they include the following: reduced mean length and width of anal papillae lumen, distinct darkening or pigmentation, widening of colorless outer lining and formation of prominent darkened and wavy structures inside lumen. The effect of using wet and air-dried water extracts of lanzones sprayed on hand gloves on host-searching activity of female adult mosquitoes did not differ significantly. The lowest number of adult mosquitoes not finding the host (human arm) was recorded on the peel extracts with an average number of 16.1±2.4 (25% peel) mosquitoes and 15.3 ±2.0 (50 % peel) mosquitoes successfully landed on the human arm. The highest number of female adult mosquitoes that found its host (host arm) is in the control while the lowest was recorded in the Insecticide (RR). The degree of olfactory interference of 25% peel extract is comparable to the commercial insecticide.

Location

UPLB Main Library Special Collections Section

Call Number

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Document Type

Thesis

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