Larvicidal activity of the aqueous extract of the clove (Eugenia caryophyllata) against Aedes aegypti (Diptera, Culicidae) under laboratory conditions
Journal Title: Journal of Research in Biology - Year 2011, Vol 1, Issue 7
Abstract
In the search for new agents capable to control the dengue vector, Aedes aegypti, bioassays were performed to assess the larvicidal activity of aqueous extract of clove (Eugenia caryophyllata) under laboratory conditions. Mortality data obtained at 24, 48, and 72 h intervals were subjected to probit analysis to determine the lethal concentrations of the extract. Larval mortality ranged from 43 to 100% among the concentrations were sampled (25 x 103, 50 x 103, 100 x 103, 150 x 103, and 200 x 103 ppm). LC50 and LC90 values were: 29.7 x 103 and 63.5 x 103 ppm for 24 h; 232 x 103 and 39.5 x 103 for 48 h; and 22.0 x 103 and 33.7 x 103 ppm for 72 h, respectively. The LC50 value for the 24 h reading differed from the others by presenting a high chi-square value; therefore, the LC50 value for 48 h was used as reference. These results suggested that the clove extract presents bioactive substances capable of killing mosquito larvae
Authors and Affiliations
Medeiros ES, Costa FM, Rodrigues IB, Tadei WP
Source of light emission in a luminous mycelium of the fungus Panellus stipticus
Mechanism of bioluminescence and light-emitting sources in higher fungi remain as an open question for a long time. We investigated the mycelium of cultivated luminous Panellus stipticus using confocal microscopy. No exc...
Effect of varied soil matric potentials on the iron use efficiency of soybean genotypes (Glycine max L.)
Bicarbonate has g enerally much more effect on iron chlorosis in soils having excess moisture than in soils having lower moisture. But, soil moisture level may or may not affect the severity of iron deficiency depending...
Transformation efficiency on E. coli in response to different bivalent salts
Bacterial transformation is the process of up taking foreign DNA molecules by bacterial cells. Bacteria, which are able to up take such foreign DNA are called “competent” cell. Foreign DNA carrying antibiotic resistance...
A preliminary study on spider diversity from a house hold garden (artificial mixed plantation) in West Tripura, India
Insects are the largest taxonomic group in the animal kingdom and their significant role in ecology needs no description. Spiders are exclusively predatory, hence can play a very important role in regulation of insect po...
Determining an effective way to control weeds in the Olam Palm, Kango (Gabon) using herbicide treatment
The fight against weeds in forest areas is a major constraint to agricultural production; indeed, the loss of production there are around 25%. The use of herbicides for control remains common. This study aims to propose...