OXICITY OF HEXANOLIC EXTRACT OF DENNETTIA TRIPETALA (G. BAXER) ON LARVAE OF AEDES AEGYPTI (L)
DOI:
https://doi.org/10.4314/Keywords:
Dennetia tripeta acute toxicity, 3rd instar larvae, Aedes aegvpti Median Lethal Concentration, LC50Abstract
The hexanolic extract of Dennellia tripetala was tested for acute toxicity on 3rd Instar larvae
of Aedes aegypti reared in the Laboratory at the Department of Zoology, University of
Ibadan,. Six sets of graded concentrations 30pprn, 50ppm 60pprn 70pprn, 80ppm and
90ppm were tested for acute toxicity on the 3rd instar larvae of Aedes agypti and total
percentage mortalities recorded at intervals of 12, 24, 48, 72 and 96 hours in each test.
Effects of sunlight and ultraviolet radiation were tested on the potency of the extract, at 2, 4
and 8 hours respectively. The mean lethal concentration LC5O was 44.7 ± 0.82ppm. The
toxicity of the extract does not persist for a longtime; the potency of the extract was slightly
affected by sunlight while the potency was activated by ultraviolet radiation.
