Effects of temperature, desiccation and hatching media on egg hatchability, larval and pupal survivability and adult emergence of aedes (Stegomyia) aegypti (Linnaeus) (Diptera: Culicidae)

Date

4-2013

Degree

Bachelor of Science in Agriculture

Major Course

Major in Entomology

College

College of Agriculture and Food Science (CAFS)

Adviser/Committee Chair

Augusto C. Sumalde

Abstract

The eggs of Aedes aegypti were subjected to one to six weeks of desiccation and were kept at room temperature (25˚C to 28˚C), in the refrigerator (18˚C), and in natural environment. After the designated duration of desiccation, the eggs were exposed to dechlorinated water (25.5˚C to 27.5˚C), hot water (65˚C to 70˚C), diluted urine (29.5˚C to 31.5˚C) and pure urine (34.5˚C to 36.5˚C). The hatchability (%) of the eggs was observed after 24 h and after 48 h. The eggs that hatched were reared until the adult stage. The larval and pupal survivability (%), as well as the adult emergence (%) was observed. It was observed that the duration of desiccation and the temperature wherein the eggs were kept during desiccation did not significantly affect hatchability (%) of the eggs. The type of hatching medium was the factor that greatly affected hatchability (%). Dechlorinated water had 7.81% mean hatchability, hot water had 0%, diluted urine had 44.47% and urine had 42.06% after the 48 h observation period. However, no significant difference between the percent hatchability in diluted urine and urine was observed. The larval mortality was also significantly affected by the hatching media. Dechlorinated water had 0.95%, diluted urine had 3.12% and urine had 5.03% mean mortality. There was 100% pupal survivability and adult emergence in all hatching media.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 2013 A3 /A54

Document Type

Thesis

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