Journal
PARASITOLOGY RESEARCH
Volume 113, Issue 12, Pages 4423-4430Publisher
SPRINGER
DOI: 10.1007/s00436-014-4120-5
Keywords
Solanum nigrum; Culex quinquefasciatus; Larvicidal activity; Probit analysis; Glucosinolate; Nontarget
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Funding
- DST, New Delhi, India [D.O. SR/SO/HS/84/2007]
- University Grants Commission [PSW 001/11-12(ERO-3811)]
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The present study was carried out to investigate the biocontrol potentiality of active ingredient isolated from ethyl acetate extract of mature leaves of Solanum nigrum L. (Solanaceae) against the larval form of Culex quinquefasciatus Say. Mortality rate at a concentration of 25 mg/L of the active compound was highest (P<0.05) amongst all tested concentrations. Result of log-probit analysis (at 95 % confidence level) revealed that LC50 and LC90 values are inversely proportional to exposure period of bioassay. A clear dose-dependent mortality was observed, as the rate of mortality (Y) was positively correlated with the concentrations of the compound (X); having regression coefficient value close to 1. The compound was found to be ecofriendly as it did not show any adverse effect to the studied nontarget organisms. Chemical characterization of the active ingredient was also carried out by infrared spectroscopic analysis (IR), mass analyses (GC-MS) and carbon-hydrogen-nitrogen-sulphur analyses (CHNS), that revealed the presence of a glucosinolate compound [1-thio-beta-D-glucopyranose-1-[(R)-3-hydroxy-2-ethyl-N-hydroxysulfonyloxy propanimidate] having the molecular formula of C11H21NO10S2.
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